Polygonal rifling vs conventional rifling. Jun 14, 2002 · accuracy is great.
May 7, 2014 · More accurate? Well That's hard to determine. Sep 12, 2008 · Does anyone know what type of rifling SA uses on the XD9SC I know the Glock 26 uses polygonal rifling which has a velocity advantage over standard L & G rifling. Conventional rifling has sharp 90-degree corners from the top of the Oct 1, 2011 · The change from conventional to polygonal rifling occurred in "early 1995" according to my information. IDPA estimation here in Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. If it doesn't , paint it. Polygonal Rifling Facts Wanted. This rifling features defined sharp lands and valleys. Polygonal rifling is most frequently observed in firearms marketed by Glock and Heckler & Koch. Jul 24, 2016 · With conventional rifling, the lands and grooves are not as well-defined as with polygonal rifling. The first advantage, is that polygonal rifling can be easier to clean. Oct 26, 2021 · Formed through the cold hammer forging process, polygonal rifling eschews traditional lands and grooves, replacing them with a more gradual “hills and valleys” rifling geometry. conventional rifling in "P"vs "CW" versions? Jump to Latest 5K views 5 replies 5 participants last post by TSquare Jul 14, 2007 Mar 3, 2024 · Polygonal rifling is a type of gun barrel rifling where the traditional sharp-edged lands and grooves are replaced by less-edged "hills and valleys" in a rounded polygonal pattern, usually taking the form of a hexagon or octagon. That's all it is, and it sucks ___. Best. Mar 29, 2008 · Polygonal rifling Vs. 0xx's. May 17, 2010 · The well-known Heckler and Koch G3 assault rifle also has polygonal rifling (from the G3A3 model upwards), as does their PSG-1/MSG90 sniper rifle. Oct 5, 2021 · Polygonal Rifling on a Glock 19 Pros of polygonal rifling: The less pronounced grooves mean a polygonal rifled barrel has more metal than an equivalent traditional barrel, resulting in higher durability and service life. 1000 Freedom Way West Bend, WI 53095 Feb 1, 2007 · "Conventional wisdom" says NOT to use lead bullets in polygonal rifling (Glocks, in this case). 45 ACP and . In some countries this may not be legally possible; if so: Nov 28, 2022 · Rifling of a Barrel: A Complete GuideBarrel rifling can be a confusing subject even for experienced gun owners. There are 5 different rifling methods, cut, button, broach, cold hammer forged and ECM; Barrel Twist Rate – is the inches a bullet needs to travel in order to make a complete revolution. But a number of firearms manufacturers use polygonal rifling, most notably Glock, H & K, and Kahr. Conventional rifling uses a tool to remove material from inside the barrel. Conventional rifling, while effective, can be improved upon in two ways. Good read and explanations of both types https://bearingarms. In the FBI GRC file, the land and groove widths for these firearms are listed as 0. gif and Polygonal vs normal rifling. 75 twist gun for the last 5 x 5 shot groups agg'd a Feb 21, 2023 · Why? Conventional rifling is an excellent choice that has been perfected over the years. Polygonal or wavy rifling has more shallow channels. Polygonal Rifling. It seems that a . I am building a . Mar 7, 2014 · I'm curious how MUCH of a difference the following make as far as durability. 025 mm maximum external deformation and 0. The lands of polygonal rifling look like bulges rising from the bore. OEM GLOCK barrels typically use polygonal rifling. The dies, broach, or button can be easily examine to determine if it is still within specs. Jun 13, 2011 · Im really considering ordering a 26" 1/10" polygonal . That's all you will get out of it. And don't forget the "date code" on these pistols is not a production code but the year the outside proof house (a vendor) proofed the pistol. conventional rifling. Dec 7, 2013 · Polygonal VS Traditional rifling Handguns: The Semi-automatic Forum Polygonal rifling is formed by hammering the barrel from the outside and is used to describe bores with unconventional rifling. When upgrading your GLOCK, understanding the difference between button rifling and polygonal rifling is crucial. } thanks Oct 26, 2005 · Re: 3 grove vs 5 groove Well the company that I'm looking into has both button and cut rifling, like you I'd rather have the cut. Polygonal rifling does not cut grooves. We pride ourselves in knowing the weapons of Destiny and Destiny 2 and helping others find proper weapons for their play style and endgame activities. May 21, 2023 · This type of profile is often called “conventional” rifling. This type of rifling is often found in handguns, such as those made by Glock or HK. I can get . Any reason why I should shy away from the poly rifling? I hear they clean a bit easier and are typically a bit faster. Disadvantages of broach rifling: Broaches are expensive and hard to make. 3- Many 5R rifling is also angled (not all, but many are). I also don't believe polygonal rifling is any cheaper to produce. Instead of grooves cut or pressed into the barrel’s bore, the entire bore is made as a rounded-corner polygon, most Oct 15, 2023 · Figure 4. S3 mostly have conventional rifling though some have poly rifling too (some s3xtremes have it) Stock 2 comes in hard chrome (hc) models or the xtreme model (black frame, bronze slide) S3 comes blued or in s3 'special' which looks like hard chrome but is a different finish. Polygonal rifling lands like bulges rising from the bore. {also the G26 has a 3. What are the different types of rifling? The most common types of rifling are conventional rifling, polygonal rifling, and gain-twist rifling. Glock rifling has never been conventional land/groove. Apr 15, 2022 · Polygonal rifling (/pəˈlɪɡənəl/ pə-LIG-ə-nəl) is a type of gun barrel rifling where the traditional sharp-edged “lands and grooves” are replaced by less pronounced “hills and valleys”, so the barrel bore has a polygonal (usually hexagonal or octagonal) cross-sectional profile. Conventional rifling is one of those great debates with no real clear answer. I wanted the same type and got a Schneider but found out it was not really polygonal, it was a sort of rounded land (it's explained more fully somewhere on the May 15, 2017 · Another form of rifling that has a significant following is polygonal rifling. Mar 15, 2023 · Many people are curious as to whether this particular model has polygonal rifling. Mar 11, 2022 · Barrel Rifling – is the spiral grooves inside the gun barrel, making the bullet spin. 0001 inch from chamber to muzzle. This leaves sharp transition between raised lands and cut grooves. Also with the 5R you have 5 lands in the bore of the barrel. This type of rifling is known for its smoother bore surface, offering a slight velocity boost and easier cleaning. 17 Reaming marks on lands of electrochemically etched barrel. 6. Polygonal rifling (/ p ə ˈ l ɪ ɡ ə n əl / pə-LIG-ə-nəl) is a type of gun barrel rifling where the traditional sharp-edged "lands and grooves" are replaced by less pronounced "hills and valleys", so the barrel bore has a polygonal (usually hexagonal or octagonal) cross-sectional profile. Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy. Chip control is an important consideration for manufacturers. Barrel rifling types Conventional Rifling. The rifling is taller on one side and shorter Feb 19, 2024 · 2. com/hammerstrikerPatreon at: https://www. 17 Some authors consider that the bullet has a better fit in the polygonal barrels. The second advantage is rifling life span. The magnitude of those advantages is not huge. 5R is an improvement over conventional rifling by changing the shape and configuration of the lands and grooves. Broach-rifled barrels may be contoured after rifling. Sep 10, 2022 · Nice read on the difference between conventional vs polygonal rifling, good read for the new gun owners as well as seasoned shooters The 5R style of rifling helps fight bullet failure. Conventional rifling has sharp 90-degree corners from the top of the land to What is 5R Rifling? 5R rifling is a type of rifled barrel that is characterized by five equally spaced lands and grooves. Instead the bore is made of a series of flats, which still provide a stabilizing twist to the projectile, Conventional rifling is a series of spiral grooves that are cut, swaged, or embossed into the round bore of a barrel via various methods [cut rifling, button rifling, hammer forged, etc. Micro-Groove Rifling Dec 12, 2009 · Poly vs. Is rifling found in all firearms? Most modern firearms feature rifling in their barrels to improve Dec 6, 2013 · I suspect the gas seal is better with the polygonal vs. How does rifling affect bullet trajectory? Rifling plays a crucial role in stabilizing the bullet’s flight and improving its trajectory. I am just trying to learn what about the polygonal rifling causes it to chew off more lead. Jul 13, 2007 · Kahr polygonal vs. Feb 2, 2013 · Polygonal refers to the type of rifling. Apr 29, 2010 · Q: What are the advantages of 5-R style rifling? A: This is a tough one. Aug 14, 2011 · Cold hammer forged conventional rifling is possible but time consuming compared to polygonal (At least as my forging experience long ago notes. Conventional/standard type rifling the land basically meets the groove at a 90 degree corner. D. What are potential advantages to having a firearm with polygonal rifling versus conventional rifling? Some advantages include a slightly higher bullet velocity. Remington's famous 5R rifling was a form of polygonal rifling, and polygonal rifling is simply a more difficult and expensive process than conventional rifling, and it is less well-known here. 16 Polygonal rifling. Many of these reports are of increased bullet speed, better gas seal on the bullet, less copper fouling/easier cleaning, etc. Mar 22, 2011 · There is frequently a very slight increase in velocity from the use of polygonal rifling in a pistol length barrel. The design of 5R rifling has offset lands & grooves which causes less bullet deformation, which is supposed to lead to more accuracy from a less deformed bullet with equally applied pressure as it travels down the bore. Several things make 5R rifling unique, the first being what it looks like. Jun 14, 2002 · accuracy is great. But everybody says that the conventional rifling will lead less. So a hard edge. Nov 22, 2023 · 2. So why should this be good? Oct 13, 2008 · Another difference between land-and-groove rifling an polygonal rifling is how they handle fouling. It might be a sufficient improvement to enhance long range accuracy and maintain supersonic velocity for a little greater distance. Rifling Lothar Walther makes a good polygonal barrel and they will be my next one just to try. Aug 5, 2012 · In the linked article below I explain the What is Polygonal Rifling and Differences Between Polygonal and Conventional Rifling. For example you lose the sharp corners on the rifling. 45 would need the extra rifling to avoid a large difference in measurements between the lands and grooves. It did come right out with one pass of the brush. 1xx's and even . If it runs drive it. -- Chuck Feb 27, 2022 · Polygonal (cold hammer forged) barrels are cheaper to manufacture than conventional button broached rifling. Conventional rifling has lands Aug 18, 2021 · Polygonal rifling has some theoretical advantages over conventional rifling: · It does not deform the bullet or cut into it the way traditional rifling does · It offers a better bullet-to-barrel seal resulting in more consistent sealing of the gasses as the bullet travels down the barrel. May 20, 2010 · Cons: leads up quickly, possibly raising pressures, most manufacturers recommend against using lead ammunition in polygonal bores. 000. Instead of trashing polygonal rifling altogether, Glock instead created a hybrid between polygonal and traditional rifling for their Gen 5 series. Are there any drawbacks to polygonal rifling? Some shooters believe that polygonal rifling may lead to increased barrel wear with certain types of ammunition. Here’s what it looks like: And here’s what the new Gen 5 rifling (top) looks like compared to the Gen 4 rifling (bottom): Jun 28, 2014 · H&K uses true polygonal rifling, those are usually cold hammered barrels, this is also cheaper technology to manufacture barrels, than button rifling, another feature that Gaston liked Polygonal vs conventional rifling barrel cross-section: What rifling do you think would be easier to make an identification or elimination on? Research what brands of firearms have polygonal rifling and which brands have conventional/cut rifling. Feb 3, 2012 · The only reason to use rifling as a deciding factor is if you anticipate firing large numbers of cast lead bullets between cleanings, in which case you should pick conventional rifling (re: drail's post, +1 all the way). Polygonal rifling has many advantages over conventional rifling in terms of bore friction, gas sealing, and minimizing bullets distortion; but it's not necessarily ideal for all barrels when issues of the scale of manufacture and absolute accuracy come into play. Mar 21, 2016 · What is 5R Rifling? 5R is an improvement over conventional rifling by changing the shape and configuration of the lands and grooves. ) I recall followup with a broach was required to get the grooves sharp. It's a lot like gain-twist rifling some people notice benefits, some don't. Ever wonder what is the difference between rifling types? Please check us out on:Facebook at: https://www. I know polygonal rifling has number of advantages over traditional land-groove rifling: ease, speed and lower cost of manufacture, less fouling and easier to clean, and tighter seal with bullet so greater percentage of gas actually pushes the bullet. Oct 25, 2013 · The thing is - true polygonal barrel as the one H&K uses, have larger contact area between bullet and bore, because of the way the barrel is shaped. The illustration below shows the polygonal rifling in a Glock 9mm LUGER pistol. 15 Conventional rifling. But it may have been nothing to worry about. Or am I just an impressionable rookie? Thanks. Improper cleaning is responsible for more bbl damage than actually shooting it. Name three manufacturers who manufacture firearms with polygonal rifling and three manufacturers who manufacture firearms with conventional rifling. If moves shoot it. It wasn’t until the 19th century that a new type of rifling, known as “polygonal rifling,” was developed. 18 r/ShardItKeepIt was founded on the principle of whether a weapon should be kept or sharded. 1-These grooves do not have a groove on the opposite side which does not "squeeze" or grip the bullet as much. 308 was bought on the longevity of barrels and after parting with a huge bag of change I wasn't looking for something that Apr 29, 2022 · This work has been released into the public domain by its author, Fluzwup at English Wikipedia. Polygonal rifling involves cutting grooves that are not straight, but instead are curved or angled. I wouldn't directly attribute it to the type of rifling as I was comparing similar but not identical models. 357 revolvers with conventional vs. With conventional rifling, more than half of all wear happens when a bullet first enters the barrel. 45, and saw enough residue to alarm me. HK used true polygonal rifling in their PSG-1 (from what I understand) and would claim MOA to 20k rounds. I really don't know when it was invented but I've seen 18th century weapons with shaped bores, some even heart shaped. I see now that manufacturers are using the "5R" label on both hammer-forged and button-rifled barrels. Polygonal rifling refers to bores with unusual rifling that are made by pounding the barrel from the outside. If it ain't broke, don't fix it. Call and talk to Woody. Little or no stress is imposed on the barrel. We also discuss Sep 8, 2010 · The barrel is different on the two, polygonal rifling in the P9 while the CW9 has conventional rifling. the later S&Ws with the rounded polygonal type rifling, the Dec 7, 2013 · In a handgun, bbl longevity is not an issue, regardless of rifling. The bullet is slightly larger than the bore and is therefore forced into this shape producing marks on the bullet known as ‘rifling marks’. docx from CURRICULUM 441 at University Of Georgia. This type of rifling creates a tighter seal around the projectile, resulting in increased accuracy and velocity. Describe polygonal rifling. Dec 22, 2017 · It is an old polygonal Glock barrel that has had two rifling grooves cut into the polygonal rifling with a button a hook or a broach to leave tool marks in the barrel. Jun 16, 2007 · Correct me if I'm wrong, but what made 5R famous was its enhancement over other geometries of cut-rifling . All rifling has a certain amount of angle to the sides of the lands as a natural effect of the rifling process. Glock's "polygonal" barrel have less contact surface than H&K polygonal barrel but more contact surface than conventional lands/grooves rifling. Feb 5, 2010 · I hope this is the correct thread for this. The absence of sharp edges in polygonal rifling is believed to reduce fouling and improve barrel life. More over, if the polygonal rifling is chrome lined, the walls of the barrel are completely slick and offer less resistance. Jun 8, 2016 · S2 has barrel has polygonal rifling. Sep 24, 2017 · Can anyone explain the differences btwn the polygonal rifling vs hexagonal rifling? On Glock's site under technology, they state that their polygonal rifling gives advantages, yet under the individual pistols the barrel rifling is referred to either right hand hexagonal or octagonal rifling. I tried some Precision moly bullets in my HK USPc . This method combines conventional and polygonal rifling shapes to better retain gas, pressure and reduce bullet deformation to further stabilize the Jul 26, 2014 · Although the bullet should distort a little to take up the polygonal section, the distortion will be less, cleaner and more regular than that associated with conventional rifling. Modern rifling tends to be either square or polygonal. This applies worldwide. They also have standard lands and canted lands in the 3 grove. Conventional rifling. Feb 4, 2022 · Polygonal rifling does not look like conventional rifling with lands and grooves. Nov 13, 2014 · P olygonal Rifling It seems like a new idea to most, but polygonal rifling has actually been around since the 1850s and Heckler & Koch has been perfecting it since the 1960s. Then, Glock picked up on the benefits and made it mainstream. Feb 11, 2011 · polygonal rifling is shaped like an arc, whereas conventional rifling is squared off at the edges. There have been many reports and opinions on an "improvement" by using 5-R style rifling vs. There is a slightly higher bullet velocity in polygonal rifling and they are easier to clean than conventional/cut rifling. The Polygonal is suppose to be more accurate, I have the PM9 and really like for CCW, it is light and smaller, can be pocket carried, you give up one round in the magazine. Jul 17, 2015 · To your original point, Most "R"-type rifling is polygonal. The 5R's benefits are in the design of the rifling. May 17, 2023 · Early rifling techniques involved cutting straight grooves into the barrel, but this proved to be ineffective in stabilizing the bullet. facebook. Cons of Broach Rifling – With broach rifling, a tool is needed for every twist rate, and the tool design prohibits progressive twist. . Sep 20, 2017 · And when did Glock drop the Polygonal rifling and go with Hexagonal rifling? "Evolution is nothing other than the preparation for the coming of the Antichrist. The sides of the grooves are parallel, but the sides of the lands are not and the 5R carries this to an extreme. ) and some of the marketing hype surrounding different methods, it can be difficult to decide what is best for you. The most common type of barrel rifling that you will find on most gun barrels is conventional rifling. Polygonal rifling has a slightly higher bullet velocity and is easier to clean than conventional/cut rifling. While looking at it and the standard barrel, the rifling on the polygonal barrel looks like it should be less aggressive so that it should lead less. Traditional rifling uses a number of lands & grooves (L&G) which are cut into the barrel, and is the style of rifling most people are familiar with. 45s have octagonal rifling vs hexagonal rifling is because of the larger barrel I. 460 S&W pistol cartridge)? Seems like a way to reduce chamber pressure by starting with a 1:12 and taper to a 1:8. I've owned both Glocks and HKs and found them to be just as accurate, and for me more so, as conventional rifling. 79 MPa. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Apr 10, 2022 · Interesting article on conventional vs polygonal rifling. I doubt one could wear out a bbl shooting it. Dec 7, 2013 · Polygonal VS Traditional rifling Handguns: The Semi-automatic Forum Feb 1, 2019 · 2. I know SIG's Classic P's use land and groove, as do the baby Sigs (P238 and P938). The projectile, the bullet, goes way faster. for this same reason, lead buildup can cause overpressure problems. But I doubt even H&K is "German" enough to have done the change over on New Years Day 1995. Oct 3, 2016 · rifling detail such as the number of lands and grooves (hills or valleys), twist direction and rifling profile (conventional lands and grooves or polygonal hills and valleys; angular or rounded [23]). Due to polygonal rifling having the same thickness in all places, radially speaking, it can have a slightly longer life span. The same can probably be said about KKM's "Button rifling" process too. And unless you get an oversized barrel and have it hand fitted by a gunsmith, then finish chamber ream it your custom handloads, you will not see any increase in accuracy. 2- the grooves of the rifling has a more ramped, or sloped angle to the rifling. It has always been polygonal. Jan 5, 2010 · Dark Mode; Light Mode; Menu Log in Sep 19, 2023 · [Polygonal vs Conventional Rifling and Glock Marksman] United States Concealed Carry Association - A South Carolina Corporation Mailing Address Delta Defense LLC. Jun 15, 2019 · Bartlein Barrels, which for years has been on the forefront of barrel research and manufacturing, and whose barrels are the most widely used in competitive precision shooting, has several comments on 5R rifling versus more conventional rifling (i. Feb 18, 2024 · A polygonal firearm barrel is a type of barrel that has a polygonal rifling rather than traditional lands and grooves. Hexagonal, or Octagonal on the . 5 inch barrel and XD9 SC has a 3 inch barrel. Jun 8, 2010 · While the lands of conventional rifling look somewhat like the angular teeth on a gearwheel, those of polygonal rifling look more like bulges rising from the bore. Conventional rifling is better suited to lead bullets; whereas, firing lead bullets in polygonal-rifled barrels is discouraged due to the build-up of lead caused by the cutting of the polygonal grooves. Whether static or dynamic, Extrude Hone’s EC rifling delivers in conventional rifling with a smooth transition between lands and valleys and polygonal rifling. 45 GAP models, refers to the number of rifling "grooves". This design is said to improve accuracy and consistency by reducing friction and muzzle jump. The rounded corners of polygonal lands and groves cause less bullet deformation, causing less drag and higher muzzle velocities. Polygonal rifling barrel has no distinctive transitions in the lands or grooves. Glock has never changed the rate of rifling used for any caliber. However, broach rifling does offer a distinct cycle-time advantage, which is more comparable to that offered by button rifling, by using a single pass. The deformation in the polygonal barrel is in a greater area, but the rifling impression left is less deep, making its identification more difficult. The barrels also are more accurate because there is less bullet deformation by the grooves and because the bores surface is formed with more consistency. Aug 31, 2021 · Single Edge Polygonal Rifling (SEP) Single edge polygonal rifling (SEP) is a proprietary method created by TRIARC Systems which is utilized to create their highly sought after Track 2. Rifling twist is consistent from one end to the other. There are no distinct transitions between the lands and the grooves. Polygonal rifling offers benefits such as a better gas seal and reduced stress Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. 2xx's to flat . Dec 5, 2011 · Most bench rest shooters prefer conventional rifling. Click for larger view Registered users only! Jan 4, 2007 · I really don't know when it was invented but I've seen 18th century weapons with shaped bores, some even heart shaped. Polygonal rifling is a bit of a misnomer. Dec 17, 2016 · I suspect they don't use polygonal rifling on any of their pistols. May 27, 2005 · Hammer forging is another method, mostly used in Europe (someone correct me if I'am wrong) and it involves the barrel being hot forged around a mandral that has reverse rifling on it. I googled some plugs for Schneider 5P rifling among target shooters. Remember that land-and-groove rifling has been around since the black-powder days, when a large percentage of the powder volume would remain behind as fouling. Conventional vs polygonal rifling material « on: Today at 07:14:24 PM » Over the last 2 years, the evidence techs in our office have been trained in basic bullet exams where we are notating weights, est caliber, twist, amount of L&G, and rifling type. Figure 4. I know hammer forging beats out button, but by how much? I know polygonal beats out rifling, but by how much? Got any stats on any of these to put them in perspective? Cold Hammer Forged vs. Glock and IWI manufacture polygonal barrels of six sides, and the Glock Gen five has a polygonal barrel of eight sides. gif Dec 1, 2008 · Polygonal rifling refers to the cross-sectional shape of the lands and grooves. What are the benefits of polygonal rifling? The benefits of polygonal rifling include increased projectile velocity, improved accuracy, and easier cleaning and maintenance. However, other profiles such as polygon, sloped or ratchet-edged, semi-polygon and others will be encountered. 7. Dec 13, 2022 · Here's a breakdown of the 3 main types of rifling, Cut rifling, button rifling, and cold hammer forged, and what we believe are the benefits. hexagonal and polygonal rifling seals in the gasses slightly better, as there's no 90degree crevice for gas to escape through ahead of the bullet. My 5 groove 1-13. Jump to Latest Follow Follow 5R is a 5-groove rifling pattern with sloped or angled sides to the lands. May 1, 2020 · Polygonal Rifling. I use the Polygonal rifling has a few "supposed" advantages. To help with this, we’re going to take a deep dive into barrel rifling, from the very basics to all The 5R rifling process results in less wear on both your barrel and your ammunition. Conventional rifling and canted or ratchet rifling, I think Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. This type has a smaller bore area than the male type of polygonal rifling designed and used by Lothar Walther. 356 Precision moly bullets locally for a good price. P. I have a glock, I shoot lead because its cheap to reload. While polygonal rifling sounds like a new idea, it has actually been around for about 150 years. Canted rifling is another term. Polygonal rifling has no sharp edges and consists of a rounded profile which can be difficult to discern when looking down the barrel. I don't think polygonal rifling has lived up to the claims of better accuracy. Conventional rifling has the groove walls parallel to radial planes originating at the bore centerline. Dec 30, 2023 · Button Rifling vs. 0 Barrels. However, many claim to have no problem or issues doing this. All aftermarket barrel makers used cut rifling. Polygonal rifling uses rounded or polygon-shaped grooves instead of traditional lands and grooves. alsoGlock KA-BoomPolygonal Ac Jun 10, 2016 · Back in what now seems like a lifetime ago, I spent a year of my life trying to find a way to match fired bullets with their respective cartridge cases. H&K, CZ and Glock use a female type of polygonal rifling similar to the bore shown above right. With conventional rifling you can get in the . Nov 12, 2004 · While conventional rifling can be hammer forged, broached, or buttoned. Polygonal rifling is common in pistol barrels, and is used by Glock (Gen 1-4), Walther, Heckler & Koch, and several other companies. now this may be just because of the manufacturer and/or the barrel design as for cleaning -- 5 minutes10 minutes if i am tired. This type of rifling produces less bullet deformation, which results in less friction and higher velocities. I believe polygonal rifling actually predates conventional lands and grooves, but could be wrong. Because the ammunition manufacturing process involves pressing brass (the cartridge) overtop the softer copper alloy (the bullet jacket), I theorized that the ‘tool marks’ left on the jacket may be unique to each bullet – even after they Apr 22, 2024 · One of the critical advantages of EC rifling lies in its adaptability to various rifling configurations. 264 wm and have heard that polygonal deforms the bullets less and lasts longer. ] Polygonal rifling looks like you took an Allen wrench [or "hex key"] & twisted it, & then turned that inside out to form a barrel. Jan 6, 2010 · General Glocking. They have a Polygonal rifling on the other hand is very different from conventional rifling. Conventional lands and grooves are 90 degrees to the bore axis. On 5R rifling, their are 5 grooves in the barrel. Chronographing the same ammo in similar barrel lengths, Glocks, and other 9MM pistols with conventional rifling, and earlier S&W . 1. I don't know how polygonal that really is versus 5R or "canted" rifling. Just trying to make a last final comparison between the XD9 SC and the G26. Jul 26, 2002 · Which is more accurate - polygonal rifling or land-groove rifling? (Given equal quality manufacture). Glock uses polygonal rifling instead of cut rifling because: "The GLOCK polygonal barrel rifling reduces wear and tear on the barrel and creates better bullet-to-barrel fit. i have an hk usp tac and a g36 clone and they are both very accurate. How does rifling affect the trajectory of a bullet? Rifling causes the bullet to spin, which in turn helps to stabilize its trajectory and improve accuracy over longer distances. 2. Between all the various types (Button, 5R, Polygonal, etc. Top-tier barrelmakers guarantee a deviation no greater than 0. Aug 18, 2010 · To add to what Butch said, I'll go out on a limb here and say that the reason the . We would like to show you a description here but the site won’t allow us. USN ET1, 63-70 Oct 18, 2013 · ALL barrels, whether land/groove or polygonal wear out faster in the throat and muzzle faster than the rifling does, the throat because of the miniature explosion that the barrel contains (very hot) and the muzzle because of gas cutting and damage from careless use. the mandral is removed from the inside of the barrel and it leaves the rifling 'imprint' in the bore. Jan 11, 2011 · So even if the rifling was NOT polygonal, and some other shape was used instead, the hammer forged process would still make barrels so identical that you still couldn't tell one from another. Do enough research and you just find more and more information that contradicts the other side. This may be anecdotal, but it sounds promising if its true. , even numbers of grooves with square shoulders): May 16, 2023 · 2. I figured why mess with uncertainty and bought an aftermarket barrel with land and groove rifling. the rifling doenst have any lands and grooves in the traditional sense, so the bullet doesnt scrape along any rifling edges. The aforementioned studies were carried out in groove rifling barrels, so analy-sis in polygonal barrels is necessary. Button Polygonal vs. com/ccantrell/2010/06/08/barrels-and-bullets English: "Conventional 8 groove rifling on the left, 14 May 2008: Source: Own work based on: Polygonal vs normal rifling. 4. View Assignment 1. It was perfected by Heckler and Koch in the 1960's. With 5R rifling I tell guys you can expect accuracy in the high . It's easier to show with a sketch. Of course, theistic evolution is especially that preparation. I also have seen the Whitworth rifling pattern rifling where the bore is a series of twisted flats, like a octogon barrel twisted in a forge. Pinzer Discussion Starter Rifling of a 105 mm Royal Ordnance L7 tank gun Conventional rifling of a 90 mm M75 cannon (production year 1891, Austria-Hungary) Rifling in a GAU-8 autocannon. This is because of the gentler angle on the sides of the lands vs. 308 Stainless Supermatch barrel from Pac-Nor. with the catch being that we were always talking about cut-rifling. Conventional rifling has sharp 90-degree corners from the top of the land to the bottom of the groove. I would suggest you check the Kahr website for more info. 112 mm internal deformation of 9 mm projectiles fired in a grooved barrel, with stress up to 269. Jul 1, 2022 · Rifling a barrel with its bore and groove diameters a bit undersized and then handlapping to the desired diameters improves uniformity from one end of the barrel to the other. This slight increase in velocity is attributed to the momentary delay, and consequent pressure buildup, caused by the bullet being initially swagged into the polygonal rifling just before it travels down the barrel. conventional rifling, and polygonal is sure easy to clean. Polygonal rifling on the other hand is very different from conventional rifling. My thinking is a 2 groove barrel will wear out much faster than a conventional 4 or 5 grooved barrel. Bartlein does gain-twist, and has great success with it. But with a polygonal rifling there are no sharp corners, also harder to determine if it is within specs. Maybe they're the best of both worlds. In reality, polygonal rifling is popular among law enforcement pistols and has been since before Glock was the mainstay. They can all be accurate. Better looks and Design. I've heard accuracy arguments in terms of cold hammer forged versus bored, but not really polygonal vs conventional rifling. Jan 28, 2020 · I have a couple of Sabatti rifles with Multi Radial Rifling which seem reasonably accurate, even in my hands and are a piece of cake to clean. 2167 Views 4 Replies 3 Participants Last post by Pinzer, Apr 2, 2008. e. Lothar Walther makes a polygon bore barrel but have stated that it is not quite as accurate as land and groove although longer lasting. Firing a cartridge in an inappropriate firearm with a barrel of a larger diameter than the bullet may leave no rifling impressions on the bearing surface of a bullet. Nov 21, 2023 · The term "polygonal rifling" is fairly general, and different manufacturers employ varying polygonal rifling profiles. There were incorrect assertions made in the gun press that FBI G17M and G19M with all other POST-Gen4 models used conventional rifling. In this article, we will examine the features of the Glock 10mm and explore the differences between polygonal rifling and traditional rifling to determine if the 10mm Glocks have polygonal rifling. 3xx's. xdeano Jan 29, 2010 · I can remember when polygonal rifling was the newest thing. The next shot would "bulldoze" the fouling into the grooves. Apr 25, 2020 · Yes I got caught up in this years ago. :dunno: Polygon rifling is just cheaper/easier to manuf. Jan 26, 2012 · Hammer forging machines can produce barrels quickly and cheaply, but the machines themselves cost millions of dollars. Nov 21, 2017 · Advantages of broach rifling: Fast and well-suited to mass-production methods. There are two main rifling types, standard and polygonal. conventional style of rifling. Jul 17, 2013 · While looking at it and the standard barrel, the rifling on the polygonal barrel looks like it should be less aggressive so that it should lead less. May 12, 2021 · Compared with 0. Oct 7, 2021 · Polygonal rifling works by squeezing the bullet instead of cutting into it like traditional rifling. Polygonal rifling was an Jun 17, 2020 · The hard edge of the lands on conventional rifling bites and drives the bullet better. There have been many claims over the years regarding polygonal rifling, oftentimes detailing reduced bullet deformity, improved gas seal, and increased velocities. 3. Polygonal rifling is also used on some handguns made by Glock, Heckler & Koch, Ceska Zbrojovka (CZ), Kahr arms, Desert Eagle and others. 5 and still be able to stabilize heavy for caliber bullets. Jan 27, 2005 · Gain twist rifling - pro\'s and con\'s Anybody ever try gain twist rifling (like the new . and accuracy is what it was supposed to have an edge over traditional rifling. Polygonal rifling's groove walls are at an angle in relation to the same planes. What are the benefits of 5R Rifling? There are several potential benefits of 5R rifling, including: Jul 3, 2017 · Bullet seal - Polygonal rifling patern is typicaly specific to bullet type , lead bullets vs jacketed bullets, most poligonal rifling you see in rifles is not poligonal bore of Metford type but its more of a trade lingo now for very rounded rifling patern , bullet when shot still has rifling patern vs being deformed to octagonal shape. The day someone wins a 1000yd rifle match with poly rifling, I might be a believer in any benefits. What are, in any, the benefits of polygonal rifling. The first, an STR chambered in . Dec 7, 2013 · Polygonal VS Traditional rifling Handguns: The Semi-automatic Forum Sep 21, 2017 · A velocity comparison of the AAC threaded traditional cut rifling G19 bbl and the Glock factory OEM polygonal g19 threaded bbl. . Polygonal rifling can be found in a lot of service or law enforcement pistols because of the benefits it provides. Feb 20, 2023 · Conventional rifling is an excellent choice that has been perfected over the years. Feb 18, 2024 · Yes, there are different types of rifling, including conventional rifling and polygonal rifling. Adequate tolerances can be held. phkmz ssbks yxji etgo xbfd hkjgsdp naa lvey kxwedly omr