The 27. Many ways have been developed for making a bullet rotate through a. The rifling process generates the grooves and lands characterizing the barrel of a rifled firearm. It is chambered in 30 BR and it is accurate. Read more about our single-point cut-rifling here. Our barrels are gundrilled with counter rotating gundrilling system. More info. 45x39mm. In this video, Jim goes behind the scenes and shows the process he developed for rifling our 44" muzzleloader barrels. Back in the day it was all about very deep cut rifling. The twist is exact, where as other forms of rifling can have variances due to the process they use. 45 to . In its traditional form, cut rifling may be described as a single-point cutting system using a “hook” cutter. lapping plug. A long rod pulls a small hook in a hard-steel, bore-diameter cylinder, removing about 0. Rifling tool having one or two raised cutting edges that cut the grooves of rifling. I've also had a number of Rock Creek tubes on other rifles. 54 – 1/66. Equipping the barrel with the spiral grooves that spin-stabilize a bullet is the essential operation that defines an entire category of firearms. See Krieger Barrels being made, start to finish. There’s a long-standing debate in the firearm industry about which rifling methodology provides the best performance. Broached Rifling -- This is done by cutting all grooves in a single pass using a special broaching bit with cutters that is inserted in the bore and. BarSto at one time ran "floating" cutters, and sometimes had alignment problems with latter passes (seen as steps in the rifling). Origin action hawk hill 6. . Rifling is the term given to the spiral grooves cut into the bore of a barrel which impart a stabilizing spin to the bullet. 1 diameter. Fifty. [Jeff Rodriguez] has been busy testing a feasible DIY method for rifling a barrel and has found some success using salt water, a power supply, wire, and 3D printed parts to create. Images of Cut-Rifling process courtesy Accurate Shooter Rifling is usually expressed as a twist rate; that is the length required to complete a full revolution along the horizontal access. This carbide Multi-flute Reamer of usually 4 or 6 Flutes is pulled or pushed through a gun drilled barrel to accurately control the surface finish and size of the ID of the barrel prior to rifling. The big bore . The cutter rests in the cutter box, a hardened steel cylinder made so it will just fit. Although our machines are state-of-the-art, the process itself is the oldest and slowest method of rifling a barrel. 32 and . One of our local CBA shooters uses a Broughton 5C barrel. This leaves sharp transition between raised lands and cut grooves. J. Straighter, more precise. Rifling is too often taken for granted, but its effect on accuracy. The most common is “button” rifling, where a roundish “button” with edges cut for grooves is pushed or pulled through a barrel to create the necessary pattern. single point cutting yields identical grooves that have less than . It’s also standard in test barrels Krieger supplies to the ammunition industry manufacturers. 4. The barreled action comes with a black Cerakote® finish or natural stainless finish using a clear coat and nickel finish. It's a production method for hundreds of barrels rather than being suited to a one-off. Legit print (The Springfield 1903 Rifles by Brophy, pg. The first thing I did when I took the rifle out of the box was to weigh it and it was just barely over six pounds. Cut rifling creates the spiral grooves in the barrel by removing steel with the use of a “hook cutter”. ”. I agree with you that "Pac-Nor does in fact use a button" but they are not cut (I just called and asked this specifically). Which rifling technique involves the use of cold-working to harden the interior of the barrel and permits the use of. Cut rifling is the oldest method of rifling a gun barrel. If the rifling grooves make a complete revolution in 9 linear inches, it is a 1:9” twist whether the actual barrel is 9 inches long, 30 inches long or just 3 inches long. Remove the cutter and using the knife, slightly deepen the lines. Bartlein Barrels. There are 5 different rifling methods, cut, button, broach, cold hammer forged and ECM. precise exact twist rates and 6 groove rifling . Re: 6 groove vs. Most button rifling mftrs will flute BEFORE final lapping and not after. The disadvantages are that he has to make his own tools, and that it is unsuited for series production. Conventional rifling has sharp 90-degree corners from the top of the land to the bottom of the groove. 58. It was a tedious and expensive process in which each groove was cut by hand. Rock Creek Barrels are made in Albany, WI. Here are some generalizations. Brady said: “Bartlein Barrels was started in 2005 by Tracy Bartlein. This required multiple iterative passes of a cutting head for each groove (at first this was done with a "scrape cutter", and later a "hook cutter"). Lots of theories here. Correct me if I'm wrong, but what made 5R famous was its enhancement over other geometries of cut-rifling . 22 to 50 BMG. However, the latter IMO, would be pointless as it leaves stresses in the barrel. Accepts and recycle scrap materialsWhile the method whereby the grooves were first produced seems not to be definitely known, it can be said that until fairly recently there have been two methods in. Broached rifling. I had him make my . 58 caliber, 3 Land & Groove, 1 in 72" Twist barrels, and most importantly, just like the originals, the machine cut "Progressive Depth Rifling-just like that found in original Springfield rifle-musket barrels. Cut Rifling Cut rifling is the oldest method of rifling a gun barrel. The six groove deep rifling was designed to spin the soft lead shells that were generally being shot at the time. Conventional lands and grooves are replaced by “hills and valleys”. If I was forced to pick a winner it would be the Remington. This was done either with a rod with a hard piece of steel. PTG Replacement Carbide Tipped Rifling Cutter. These variables can give the unknowing shooter a false impression that one caliber or cartridge has superior life than another or one barrel manufacturer is superior than another’s. with the catch being that we were always talking about cut-rifling. The six groove deep rifling was designed to spin the soft lead shells that were generally being shot at the time. This greatly improves the accuracy of the bullet over longer distances. One of the main purposes of Microgroove rifling was to help the bullet seal off the bore better to keep the expanding gas behind the bullet, and. Creating the spiral grooves is accomplished one of several ways. In its traditional form, cut rifling may be described as a single-point cutting system using a “hook. The quality of the barrels turned out by this method was very good, but it is a time-consuming process that slowed down production (the scrape cutter rifling process took about an hour to complete. The answer is yes, it is worth sharpening a circular saw blade. Hammer forging is an equipment intensive but efficient method for making rifled gun barrels. It happens when the top of the rifling cutter is ground on an angle and it will cut the. What im saying is from what Ive seen from two different barrels with diferent styles of rifling. Back trench the cut along the inside of these lines. They are used to remove metal from the surface of the barrel to create the grooves and spirals. Rice uses a proprietary, infinitely-variable CNC rifling machine, which has a traditional Springfield type rifling head to single hook CUT each groove. 16530 posts · Joined 2000. As the name implies, the 5-R rifling on the 20-inch stainless steel, hammer-forged barrel is one of the rifle’s major features. This is what I got from my S&W engineer acquaintance this evening. If the barrel will have six grooves, each ring will have six cutters. The cutter is a single tooth cutter that is adjusted for height by packing a thin piece of paper under the cutter,sandwiched between the cutting head and a half round slip of hard wood. The curved surface of the. The cut-rifling method removes metal from the surface of the bore to create the grooves using a single-bladed, hook-type cutter of groove width that is pulled through the cold barrel. Instead of being smaller than the radius of the bore, the radius of the cutter should be at least twice as large as the bore radius. Hold the equipment square, parallel, and concentric everywhere, because precision is the byword in barrel making work. Kr. Cannon barrel rifling (baku13, CC BY-SA 3. You will even find some loading books that say, cast bullets don't do well in MG barrels past about 1. 22 to 50 BMG. mark on the surface of a fired bullet made when the edges at the beginning of the rifling scrape the bullet surface or when the nose of the bullet slides on the surface of the forcing cone of a revolver barrel. Cut-rifling is also the only practical way to rebore barrels. due to the superior throughput of hammer forging and button rifling. Drilled barrel bores is still very much a thing. Custom Prefits - Ospreys. Contact gunsmith Wayne York, he is in Oregon, he charges $200 to rifle Handy-Gun barrels according to ATF specs to remove them from the NFA. The result is a clean, 3-degree pocket hole with minimal tear-out, around either the pocket or the pilot hole. Marlin's Microgroove Barrels. Cut rifling can produce rifling as good as any method. What im saying is from what Ive seen from two different barrels with diferent styles of rifling. Cut Rifling Machines. This article describes in detail how barrels are crafted, using both cut-rifling and button-rifling methods. "Round bottom CUT rifling . This recovered Hornady . Rifling begins by mounting the barrel in the machine and setting the desired direction and rate of twist. Ballard rifling came about during the years Marlin made Ballard rifles. By the nature of the manufacturing process, cut-rifling puts fewer stresses in the steel and twist rate is more likely to be uniform. Single point cut rifling is the most accurate method of rifling and produces low stress on the barrel during the cutting process. Button rifling is done with a straight barrel blank to reduce the amount of variation in the groove diameter. The button forces the steel. It is a well-known name for high-quality rifle barrels. The price difference is simply the cost difference paid to our primary barrel supplier, Rock Creek. What is the twist rate of the Remington 700? The twist rate of a Remington 700 depends on the specific model and caliber, as they are available in various configurations. Single-point rifling. The process of Single Point Cut Rifling is the most stress free way to rifle a barrel. Conventional rifling has lands and grooves. To make a cut-rifled barrel, a hook is pulled through a rotating barrel blank that cuts away material to create the rifling in a specific twist rate. #2. The broach is a piece of steel alloy that provides strength. I am looking to build up a lever . Ballard rifling was 'cut' using a cutter, or cutters, turned in a previously prepared barrel blank at the preset twist rate. You can harden the barrels before drilling, however. A 3-inch barrel with 1:14” twist spins its bullets the same as. The three major types of rifling are made by cut rifling, button rifling and cold hammer forging. It's more susceptible to button slip (twist rate error) and displacing the material work hardens it and creates internal stresses. The hook cutter is pulled through. . J. It can also produce superior barrels, thanks to. With this type of cutter, it is possible to set the depth of cut very precisely by rotating the bolt on the left side. Cut rifling - Cut rifling creates spiral grooves in the barrel by removing steel using some form of cutter. 6. groove deeper on one side than the other, thus giving the illusion of "ratchet" rifling. At the beginning of WW2, Americans realized that the cut rifling methods then in use couldn’t produce quality barrels fast enough for the War Department. This type of rifling is produced with hammer forging; rifling with rounded profile. Hammer Forged. ) a hardened steel button can be used to make rifling, c. To simplify, cut rifling involves actually cutting or scraping the grooves in the steel to eventually form the lands and grooves of the rifling. In a 50 caliber rifle, the cutter is ground to an exact radius to create a round shape that is a circle. READ Full Article. Since the rifling is cut by a broach, you need a different broach for different rifling twist rates. The cost of the blank, of drilling the hole and of reaming and lapping are all extra. are experiencing increasing demand. Gun drilled with a bad combo of cutter wear, feed rates, chip clearing. Cylinder - The rotatable part of a revolver that contains the chambers. In a 50 caliber rifle, the cutter is ground to an exact radius to create a round shape that is a circle. The TAC 501 rifle system is a heavy 416 SS barrel with cut rifling, manually operated, detachable box magazine with five +1 shot capacity. I used a Weaver brand picatinny scope base for a. 35s, to ensure stabilization of even the longest bullets. My dad made both button and scrape cutter rifling machines to rifle his ML barrels up to 60 cal and 2in dia. Click Arrow to Watch Krieger Barrels Video:Rifling broach. No additional stress on the barrel - no stress relief step is required. Both types of rifling can produce match winning barrels, however the market currently favors cut rifled. There are two main rifling types, standard and polygonal. You may need to adjust the speed of the cutter as you make the cuts. Cut rifling is the first rifling method to date which was invented in Germany around 500 years ago. 005 to . 40 – 1/48. Several nationally known benchrest shooters shoot Bartlein barrels. The principle problem was (and is) the availability of cut rifling machines - you don't exactly trip over them at machinery auctions. When these marks are on the lands "only" it is from the drilling process before the final reaming to get the proper bore size. 5R rifling tends to erode faster than cut rifling with wider lands and narrow grooves. 0001” deviation between each other because they. Single-Point Cut-Rifling. 0001 (not . Inside of the rifled barrel of a French 75 mm gun of WWI. Then button rifled without and honing or lapping before or after drilling. In addition, the article describes a new (and somewhat radical) method, Cation Rifling, which employs acid to etch rifling. 218/. provide exceptional accuracy. Lawton did cut rifling, and also produced the worst barrel regardless of rifling method my gunsmith ever had in his shop with 33 years gunsmithing experience. During the rifling process the cutter only removes . Button rifling doesn't cut. See Figure 103 & 104. How many grooves does a scrape cutter make with one swipe? 2. Broach rifling is a cutting process that uses a long, multi-toothed tool that gradually removes small amounts of material from each groove. Historically, low-budget small-run, small-shop and independent prototype rifling has usually been done with a single-point scrape cutter, as it is the most readily improvised tool. So, on a . Does the material of the barrel affect rifling choice? Yes, the material of the barrel can affect the choice of rifling, as softer metals may not hold up as well to the erosion caused by cut rifling. It is best for barrels that do not require deep rifling grooves. Using a small 1/8" chisel, carefully remove the wood from the inside the mortise to a depth of about 1/32" to 1/16". . We. While button or cut rifling must start with a hole somewhat smaller than finished size, hammer forged blanks have holes about 20% larger than finished size. Then he’d. Available through Patriot Valley Arms exclusively for the long range, precision rifle market. All of our barrels are manufactured using single-point cut-rifling and each and every barrel we make is thoroughly inspected and held to the same premium match grade standards, whether its an ammunition test barrel, a custom bolt action barrel or a ready-to-install finish chambered AR15. Conventional rifling, while effective, can be improved upon in two ways. Ballard rifling came about during the years Marlin made Ballard rifles. The Model 80 and 80E were made from 1935-1939 while the 80B and 80BE were made in 1940 only. The main focus of the article is on Cold Hammer Forging of. Marlin appears a bit better designed - any thoughts pro / con ?The rifling head is a hollow cylinder, and is made of high-carbon steel with a slot for the cutter cut lengthwise, about two inches long, on one side. The most commonly used rifling method is called 'broach rifling'. The quality of the barrels turned out by this method. This plug should never be removed from the bore until its work is finished. No need to worry about to hard to cut, or annealing after button rifling. Shape, number, and depth of grooves can be changed easily. It produces moderate amounts of stress in the steel, which can be stress-relieved and straightened. Button barrels the twist is mostly controlled by the shape of the button and the twist rate can vary depending on many variables. The cutter rests in. The Model 444 was introduced with a 12. What are six advantages of cut rifling? 1. The purpose of rifling is to impart a rotational spin to the bullet along its longitudinal axis. It is available in three distinct finishes, including simple Black DLC, along with Titanium Nitride and Chameleon PVD as well. Today, four- and six-groove barrels are the most popular. You can see this in the image above . Together, these grooves and lands. A round bottom groove design is very good for PRB's, with deeper grooves. Cut Rifling – This is an older, more traditional method that isn’t commonly used today. The quality of the barrels turned out by this method was very good, but it is a time-consuming process that slowed down production (the scrape cutter rifling process took about an hour to. Equipping the barrel with the spiral grooves that spin-stabilize a bullet is the essential operation that defines an entire category of firearms. Barrels: Cut Rifling vs. 5355 posts · Joined 2019. The cutter removes approximately . Some folks think cut rifling can wear quicker due to the sharp interior surfaces. The GROOVES are a bigger diameter than The Caliber or Bore. The part that grips the patch is the edge of the rifling. Cut-Rifling is unique from other rifling methods in that it allows virtually any twist rate to be cut into your barrel. RIFLING ROD. SPECS: 22 call land/groove diameter: . What is Button Rifling? In button rifling, the “button” is actually a tool made of tungsten carbide. Button rifling causes the metal in the bore to displace around the die and is. Join Date: February 20, 1999. Then I cut a slot about 0. Our President (my father), Steve Dahlke, partnered with John Krieger to establish a button rifling process capable of match grade performance. Hard to find good help, eh?. The Broughton 5c rifling looks alot like the rifling in a glock no sharp edges. Lands and grooves having a rounded profile. Cut Rifling – This is an older, more traditional method that isn’t commonly used today. The section on hammer forging is written by Ruger’s head of barrel making, Vern Briggs, and James Higley, Professor of Mechanical Engineering Technology at Purdue University Calumet in. Rifling can be cut into the inner surface of a barrel using a broach, the rifling can be formed using a hardened steel button, or the rifling will be formed through a process called hammer forging. 104. . 22 caliber barrels or pellet guns. The biggest differences here lie mostly within the form factor. 016 deep. The cutter body features a TiCN coating for long-lasting accuracy of results. Cut rifling and broach rifling both involve removing metal from the inside of the barrel, which produces “grooves” that lie in between uncut areas know as “lands. The mold matched the 1 in 20″ twist of the rifling. Showing 1 - 3 of 3 items. The. There is a slightly higher bullet velocity in polygonal rifling and they are easier to clean than conventional/cut rifling. The work hardening of the barrel steel caused by the button results in a bore surface that is denser than a cut surface. . Add to Wishlist. You poured the lead in the to of the mold, and used a special mold handle with a rod to push the bullet out of the mold. When running properly a carbide cutter is capable of rifling 10-20 barrels before resharpening. Single-point rifling. The pressure exerted by a burning charge of powder in the chamber of a gun. The cutter rests in the cutter box, which is a hardened steel cylinder made so it will just fit the reamed barrel blank, and which also contains the cutter raising. #10. Cut Rifling Machines. The cutter is shaped like a wide and squat "t" to fit into the slot with the center vertical of the "t" passing through the hole. 002-0. This sets us separate from the other barrel maker's out there that drill with a stationary drill with the barrel rotating. This is why I always go back to a cut barrel being better than a button barrel. Rifling made by a broach cutter or button with produce rifling with sharp edges . Machine will cut up to a 26" by 1 1/16" barrel with a twist of as much 1 in 10". Rifling in a . After. Twist. Twist rate is also spot-on, on cut rifled tubes. Occasionally during this process something goes wrong. In addition, the article describes a new (and somewhat radical) method, Cation Rifling, which employs acid to. 30-caliber cartridges are loaded with . Also I do believe in the 5R rifling does help fight bullet failure. 358 STA barrel with a one-in-12-inch twist, far faster than the standard 1-16 for . 60. Inspect the cutter for any damage or worn parts and ensure that all parts are in. It comes down to the people making them, the tooling, the process, the lot of steel, and the guy chambering it. AC KRO GRUV is Mossberg version of marlins Microgroove ~~ MicroGroove Rifling [edit] Micro-Groove rifling. Rifling refers to the spiral (helical) grooves that are cut or swagged on the internal surface (bore) of a gun barrel, which helps impart the spinning motion to a bullet when it’s fired. On the other hand, many shooters believe cut-rifled barrels last a bit longer. Rifling. 30 cal, say 1 in 10, 11 or 12" (if you offer one of each), you’ll need a mandrel appropriate to each. DeHoff gun barrel machines are used by over 50 firearms companies all over the world. It takes a LOT of effort to pull a . We proudly create rifle barrels for F-Class. The rod should spin freely in its handle, and the jag and patch should fit snugly in your barrel. The lands and grooves create a unique pattern on the bullet casing that can be used to identify the gun from which the bullet was fired. Rifles and handguns have rifled barrels, that is, spiral grooves have been cut the length of the interior or bore of the barrel (Figure 2. "The most important part of such a gun - the rifling in the barrel - is in the Ballard the best yet produced. It is mostly all automatic with a long shaft with a ground cutter made from TanTung or Cobalt. Rifling consists of these grooves and the metal left between the grooves—the lands (see Figure 1. The drawbar attaches to the worm wheel and to the rifling cutter with precision tapered cross pins. Cut Rifling consists of removing steel from the inside of a barrel using a cutting tool with a hard point. Equipping the barrel with the spiral grooves that spin-stabilize a bullet is the essential operation that defines an entire category of firearms. Pick the blade carefully and put it on the holder. March 8, 2017. The twist is 1:12, bullet weighs 216-grains from an Accurate mould and a mv of about 1900 fps. Krieger Barrels offers a wide variety of twist rates that are appropriate for popular bullet weights in any given caliber but it is also possible to specify your own custom twist rate. In polygonal-rifled barrels, the barrel (and hence the bore) is cold hammer forged (or otherwise twisted) creating swells or mounds, also giving the bore a defined rate of twist. Starting with a pilot section, a rifling broach has multiple rings of cutters whose axial cross-sections match the rifling layout. Button rifling is simpler and faster than cut rifling and usually less expensive. Barrel steel is 1214 ,nice for cut rifling and also what throat lead in from chamber end to rifling. The discussion between button & cut rifling will go on forever, however, both are fine if the skill of the maker is also as good as his tools. #14 · Aug 14, 2021. A real cut rifling machine is getting closer to a real 3 axis machine. 280 posts · Joined 2017. 0002" per pass. Cut rifling is done by hand or with a tool that cuts one groove at a time through the barrel. . Screw the two parts together and start sharpening the cutter. The idea of rifling a barrel to make it shoot truer and harder was not new, to be sure. Single Point Cut Rifling. Cut rifling is done by hand or with a tool that cuts one groove at a time through the barrel. Conversely, the scrape cutter has mu l ti-point cutters inset into the opposed sides that can scraped a minimal of two opposed grooves to all grooves at a time. For. At the same time, the expansion of the fired cartridge. 1. 5R is a 5-groove rifling pattern with sloped or angled sides to the lands. We thought of something like John Browning’s hardwood rifling machine, updated, but it seems wiser to first undertake a survey of available and historic technologies. 3. Two. Just making the buttons took a fancy cutter grinder and diamond wheels as well as a premium grade of carbide. Cut rifling is the oldest of the three methods, and is done by cutting the rifling grooves one pass at a time as you push through the barrel. And my thought is that square edge of the lands being sharp wear faster. The quality of the barrels turned out. Rifling Photograph of Rifling --- spiral grooves cut in or forged into the bore of the barrel that impart a rapid spin to the single projectile, gyroscopically stabilizing it in flight for greatly improved accuracy over that of a smoothbore gun. The 80G was made in 1965 only under the Glenfield name and was the same as the 80C except for having a. The barrel also has a flush crown cut, which. 0001-inch per pass. In broach cut rifling, the bore is cut to the land diameter and then the grooves are cut out by a broach. The cut-rifling method removes metal from the surface of the bore to create the grooves using a single-bladed, hook-type cutter. As previously stated it is hard to get extra deep rifling to seal, and not burn up the patch. Cut rifling is single point broach rifling, you are. Yes. 40 – 1/48. Brux Barrels is a machine tool company located in Lodi, Wisconsin, specializing in the finest custom-made cut-rifled barrels. e. The first rifling method to date, which is now done with modern machinery. For background, current thought is to build a 600 yard f classer, right now looking at a 260 AI or variant thereof. To make a rifled barrel, normally a hole is deep-drilled in a steel bar. I believe they called it electrolytic rifling. Reactions: stefan73. The same practice applies to rifling, buttoned or cut. You wee left with a long spru that has to be manually cut off. Broaching uses multiple cutting surfaces (cutters) mounted on the same axis to progressively remove metal. I see now that manufacturers are using the "5R" label on both hammer. Mar 6, 2006 2,869 2,608 CENLA. We rifle all of our barrels using the single-point cut-rifling process. 254 posts · Joined 2023. Single-Point Cut-Rifling is the oldest and most accurate way to rifle a barrel. The collar has a screw that is turned to lock into the holes. Some other rifling buttons are combo buttons that have both a rifling button and a finishing button or sizing button. Then the grooves are cut on a sine-bar rifling machine with a single-point cutter. 3crows said: No, Remington built Marlin . The cutter is adjusted to cut one- to two-thousandths of an inch of metal on each pass. 5. This method produces almost perfect concentricity between bore and. The ogives jammed into the leade. 4' stick of 4" SCH-40 PVC with a strip of something wrapped around it like a barber pole. With cut rifling, grooves are carved into the barrel using a cutting tool, whereas with button rifling, grooves are pressed into the metal using a hardened steel button. cut to provide a completely stress free barrel. Anything gained by using 5R rifling, is then subsequently lost. How many grooves does a hook cutter make with one swipe? 1. During the 20th century, new swaging methods such as button. The simplest types of rifling buttons merely cut the grooves into the barrel. Each disc on the broach is a mirror. The process is usually very consistant, with a very fine bore finish, and produces a better than average accuracy, with less cost than cut rifling. It would pretty easy to make a good low cost cutter using a CNC plasma with the pipe cutter attachment, and a half a day on the Bridgeport. This hook has to be pulled through the barrel’s bore on multiple passes before the process is complete. The ideal is to have the correct groove diameter, . Button rifling can produce a very smooth interior finish, and the majority of winning 6PPC barrels are buttoned. Don't know about Chanlyn's backlog. . It is sometimes called "hook rifling" after the fishhook-shaped cutter used. Cutter is made to SAAMI specs. IMHO the real difficult part would be mastering how to. The cutter removes approximately . Obermeyer got the idea for 5R rifling while examining the bore of a Russian AK-74 rifle in 5. If the barrel chamber finish reamed to the desired headspace still causes the issue, then a leade reamer is needed. Cut rifling creates spiral grooves in the barrel by removing steel using some form of cutter. The cut-rifling method removes metal from the surface of the bore to create the grooves using a single-bladed, hook-type cutter of groove width that is pulled through the cold barrel. The cutter is adjusted to cut one- to two-thousandths of an. Krieger single, point, cut-rifled barrels have set numerous. Many years ago,I was invited to watch button rifling being done. The article explains four common methods of rifling the interior of barrels: Cut Rifling, Broach Rifling, Button Rifling, and Hammer Forging. I also have a late 336SS and it definitely has MG. Broached rifling.