Â The rifle was equipped with a Remington Varmint contour barrel with a 1:9 1/8″ twist from the factory. Mag. Â The 6mm BR can be made to feed well, but the relatively short length of the case can be problematic with the constant tension ejector on the Remington 700 action, making extraction an issue. The Dillon RL 550C will produce match-quality ammo for over 160 different rifle and pistol calibers. mm (in) Thread Tools. Opinions? Â This is important to prevent the barrel from slipping when it is help in the barrel vise. Mag.• .30-06 Springfield vs. .270 Winchester• 6.5 Creedmoor vs. 7mm-08 Remington• 8x57 Mauser vs. .318 Westley Richards• .358 Winchester vs. .350 Remington Magnum• .22-250 Remington vs. .220 Swift• .270 Winchester vs. .270 WSM• .26 Nosler vs. 6.5-300 Weatherby Magnum• .458 Win. Now the decision was between 6×47 Lapua and 6 Creedmoor. Modifications to a firearm may result in personal injury or death, cause the firearm to not function properly, or malfunction, and cause the firearm to become unsafe. Â With the bolt and trigger removed, the action is secured in an action wrench. RL 550 Caliber Conversion Kit. by Philip Massaro -
The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. It uses the same design method as the 6.5 Creedmoor; this results in excellent and consistent accuracy from one gun to another and load to load. Bolt face and magazine length would be the same. The 6mm BR is known to be one of the most accurate cartridges produced, especially at mid range distances to 600 yards. The standard rifling twist for 6mm Creedmoor … The 6mm Creedmoor uses a 30 degree shoulder angle, its max case length is 1.92" and the COL is 2.8" The SAAMI MAP is 62,000 psi. ), and .240 Weatherby. The 6mm bore diameter has long been relied upon for double duty, serving the deer hunter and varmint/predator hunter equally well. The parts are then soaked in acetone. 6mm Creedmoor vs 243. in 1955, the same year Disneyland opened, gas cost 23 cents per gallon and we launched the world’s first nuclear submarine. An insert threading tool is used to cut the thread at 16 TPI. vs. .300 Win. It’s also important to note that the .243 does include several rounds that fall beneath the 60gr bullet weight which is significantly lighter than other .243 Win and 6.5 Creedmoor rounds. Â The part are placed in a heat curing oven and allow to heat, this will allow any oil in the metal to leech out. Â Since this rifle had good bones, we decided to rechamber it in another cartridge, 6 Creedmoor. Looking for previous installments of our "Head to Head" series? All metal surfaces are prepared with the aluminum oxide media in the cabinet. Â The parts are placed in a fiberglass bin. My buddy John Snow—now editor of Outdoor Life—was writing an article about the pleasures and pitfalls of developing his own cartridge. This is what the factory barrel tenon looks like, note the left over thread locking compound from the factory. Precision, wrote the piece on his necked down 6.5 Creedmoor, and moved on. Â For the 6 Creedmoor you can buy brass from Hornady. As I understand it the 6.5 Creedmoor is on a case very similar to the 308 and can be made from 308 case's. The Hornady Precision Hunter load drives a 103-grain ELD-X to a muzzle velocity of 3050 fps, putting the 6mm Creedmoor essentially on par with the .243 Winchester, but it’s the ability to properly seat the longer bullets with the best ballistic coefficients that gives the 6mm Creedmoor the edge out beyond 500 yards. The 260 Rem is made on the 308 case but I have no idea how easy or difficult finding ammo might be in factory form. The standard barrel twist rate for the 6mm Creedmoor is 1:7.5” whereas the standard for the .243 Winchester is a 1:10” twist. Sorry, your blog cannot share posts by email. Cerakote heat cure, MAGPUL flat dark earth, 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Installing a pre-fit barrel on a Remington 700, Refreshing a poorly machined Remington 700 action, 1911 Gunsmithing: lower and flare ejection port, Sheared screw removal (drill and back out method), 308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP, 60 years too early? Thread Tools. Â Decisions, decisions… I already have a 6×47 Lapua that hammers, so 6 Creedmoor it is! The rifle is finished off with the following parts: 300 BLK accuracy problems? That said, I feel it will be some time until the .243 Winchester is unseated, especially among hunters. […]. The 20-degree shoulder of the parent is maintained, and the 2.045-inch case launches a 100-grain bullet at a muzzle velocity of right around 3000 fps. Â The acetone doesn’t evaporate as fast as the TCE. Sizing the Cartridge. Â Easy. Mag. Â I take it slow, a few thousandths at a time as I reach final depth. Â For both cartridges, the 6.5 brass is simply necked down to 6mm in one pass and the brass is formed. Can I ream a .243 to 6mm CM? I like to sneak up on final headspace. The 6.5 Creedmoor came onto the scene just about a decade later as a result of the work of Dave Emary of Hornady and Dennis DeMille of Creedmoor Sports, who paired to come up with a long-range target cartridge. Snow has found this extends brass life, as well as giving more room in the shortened case. 0. August 22, 2016 The parts are coated with a small HVLP gun. This article lists firearm cartridges which have a bullet caliber between 6 millimetres (0.236 in) and 6.99 millimetres (0.275 in).. It's now easier than ever to convert your Remington 700 BDL hinged floor plate over to a detachable magazine box feeding system. The barreled action will sit in a Grayboe stock. There's a reason JP's HP bolt is the go to standard for people building 6mm/6.5mm semis and is the reason many factory barrel makers headspace to JP bolts like Rainier. The recoil lug should fit over the tenon with little to no play. Â A pipe on the handle of the action wrench helps break the action loose. The 6 mm Advanced Rifle Cartridge (ARC) (6×38mm) is a 6mm caliber (.243) rifle cartridge introduced by Hornady in 2020 as a low-recoil, high-accuracy long-range cartridge designed around the AR-15 platform.. These kits fit the RL300, RL450, RL550 series, AT500 and BL 550 machines This kit contains: The Hornady Precision Hunter load drives a 103-grain ELD-X to a muzzle velocity of 3050 fps, putting the 6mm Creedmoor essentially on par with the .243 Winchester, but it’s the ability to properly seat the longer bullets with the best ballistic coefficients that gives the 6mm Creedmoor the edge out beyond 500 yards. Drop and wind deflection are considerably less with the bullets loaded in the 6mm Creedmoor, and therein lies the difference. (originally the .244 Rem. In this case a spider (4 screws) is used to gimbal the barrel concentric with the lathe. Â The goal of this project is bringing new life to a beat up old gun. To begin, I full-length size the parent cartridge so that I have a known starting … vs. .458 Lott• 7mm Rem. Post was not sent - check your email addresses! Â I typically use a spray degreaser like Brownells TCE, however, Acetone is less expensive. Â A piloted form tool will not work in this application since the barrel already had previously been chambered. The barrel is placed in a vise and torqued in place with an action wrench. Â This barrel shot well and worked with our favorite 6mm match bullet, the .243″ diameter 107 grain Sierra MatchKing (SMK). For this project, I ordered the following products from Brownells: The barreled action is removed from the stock. Get the American Hunter Insider newsletter for at-a-glance access to industry news, gear, gun reviews, videos and more—delivered directly to your Inbox. 6mm Creedmoor in Good Company. .243 to 6.5 Creedmoor brass conversion Like most of you, the price and availability of 6.5 Creedmoor brass is a problem for me. Â The color is MAGPUL flat dark earth. Additional magazine boxes are available in various capacities. Bill Marr The 6mm ARC is a brand new cartridge that Hornady designed to fit into a standard AR-15. First, virtually all bolt-action hunting rifles are available in .243, and there are also AR-10 variants as well (though they won't handle really long, high BC bullets if that matters to you.) The smaller firing pin hole is not the only design change of JP's HP bolt. Gunsmithing, Precision Rifles, Rifles has several significant advantages over the 6mm Creedmoor that are primarily the result of the .243's six-decade head start in development. While the latter two designs are viable hunting cartridges, neither of them really challenged the .243 Winchester’s position at the top. There is no secret, I’ve never been a .243 Winchester fan, always preferring the much hotter 6mm Remington. Â I prefer the aluminum bushings because they are stickier and resist slipping fairly well. The barrel is now removed from the lathe. I will be cutting the chamber with a piloted high-speed steel reamer. Â I knew I wanted something that burned less powder than the 243 Winchester, and came up with a few different options, the 6mm BR, 6 Dasher, 6×47 Lapua, and 6 Creedmoor. There have been military developments, as in the 6mm Lee Navy (father of the .220 Swift), but the post-WWII era saw some very fine designs; 1955 alone saw three important 6mm cartridges. Let me know what you think! Similarly, the 6mm Creedmoor compares to the 243 Winchester. Â Removing factory barrels can be difficult, use of a port entry action wrench can bend the action, a wrap around wrench, like the Brownells shown in the picture above, is a better choice for this type of operation. RL 550 Caliber Conversion Kit. A 35 degreee high-speed steel profile tool is used to cut a small stop groove between the threads and the part of the tenon the lug will sit on. I know 22-250 cases are preferred for forming 6.5 Creedmoor, but I would think 243 brass would work. Remington 700 SPS Varmint chambered in 243 Winchester. Early testing indicates a 1:7.5 inches twist rate is ideal for stabilizing long bullets in the 6mm ARC. Our stainless steel teflon coated in black conversion kits include a new Pro Series Floor metal and magazine box. Â Grayboe is a new company, started by Ryan McMillan. I mount the barrel in the lathe between centers. There are good reasons why the .243 remains at the top of the heap; it is nothing more and nothing less than the .308 Winchester necked down to hold .243-inch diameter bullets. As a caliber, the 6mm has the least number of commercial members. From that marker, the 6.5 Creedmoor overtakes the .243 Win and carries higher velocities than the .243 that bleeds off velocity at a much higher rate. The tenon is cut to 1.062″ in diameter with a 3/8″ high-speed steel insert tool. $1,218- without the cost of resetting the barrel and cutting a new chamber. ede. Â I decided to reuse the lug on this rifle since it was flat when I checked it. The 7mm-08 is also on the 308 case and ammo shout be as easy to find as the 6.5 Creedmoor, both very popular. Â The Lapua uses a small rifle primer while the Creedmoor uses a large rifle primer. I tried feeding 6-250 dummies into my .308 w aics mags ans they dont work past 5 in the magazine I know performance between most of the 6?? The .243 Win. Â While I’ve built two different 6mm BRs on 700s that extracted well, I elected to avoid potentially dealing with this issue and pick a cartridge with a longer case length. I’m not sure if the ability to load the longer bullets with higher ballistic coefficients, in a 308 length magazines, can be offset by the decreased chamber volume. Enter your email address to subscribe and receive notifications of new posts by email. It uses a shorter case than the .243 Winchester—1.920-inch vs. 2.045 inches—allowing for a longer bullet length outside the case in the same length magazine, and maintains the 6.5 Creedmoor’s 30-degree shoulder. Messages: 12,385 Likes Received: 5,072. Â The only downside is the cartridge, the 243 Winchester is a great hunting round and quiet capable for use in matches, however, for the competitive shooter, there are smaller, more efficient rounds that approach the 243 Win in performance. The 6.5mm bore diameter was an obvious choice, but the .260 Remington case was too long to allow the use of the high B.C. The 6mm Creedmoor would come along—almost as a fluke—in 2007, and follow the short case/long bullet trend in cartridge development, but does it have enough to make a hunter deviate from the tried-and-true .243? Why 6 Creedmoor? Ready to Cerakote. Â The vise is attached to the leg of my work bench. Â In this case a spider (4 screws) is used to gimbal the barrel concentric with the lathe. Â Note I use a different wrench (Surgeon) and vise to install the barrel than I used to remove it. Â This is because this type of vise is faster to use and installation doesn’t require as much force as removal of the factory barrel. However, with the virtual obsolescence of the 6mm Remmington in both firearms and factory ammo I was stoked to try the new 6mm Creedmoor with its Hornady Precision Hunter loads. If the long-range shooting craze hasn’t possessed your soul, but you still want a cartridge that will shoot flat and hit hard, there are no flies on a .243 Win. Constructive criticism welcome as is support :D Like, share, subscribe and leave a comment! The barrel is held in a barrel vise. Â This allows for smooth feeding. Â The bolt should effortlessly close on the go gauge. I mount the barrel in the lathe between centers. The target crowd—especially those who are competing in or have an interest in the PRS competitions—will certainly appreciate the down range benefits of those high B.C. Â The Grayboe (front) has the same basic shape as the McMillan A5 (rear, green) but costs significantly less. Over to the blast cabinet. Since the original chamber is for 243 Win, a larger cartridge than the 6 Creedmoor, I begin by cutting off the threaded end of the barrel. Â Approaching 1/3 MOA accuracy at 500 yards, this modestly priced rifle exceeded expectations. However, having been with us since 1955, the .243 Winchester is a very effective hunting cartridge, especially inside of 500 yards, and when used on game animals of suitable size and build. Â This one is equipped with a reamer stop to help control the depth of cut. Â Perhaps the biggest difference between the two is the brass, the Lapua can be formed from Lapua brass, while the Creedmoor requires either the use of Hornady brass (which isn’t very good) or Norma brass which isn’t always encountered. .243 To 6mm Creedmoor Discussion in 'General Firearms Forum' started by ede, Jan 28, 2017. Print; Jan 28, 2017 #1 . Â Have a certified gunsmith inspect and check any work prior to attempting to fire. Â Not too bad and under the price of a Ruger Precision Rifle and approximately the same cost as a custom action. The 6.5mm Creedmoor (6.5×48 mm) or 6.5 Creedmoor by SAAMI, 6,5 Creedmoor by the C.I.P. It’s readily available, has been in the top ten in sales for quite some time, and has been putting smiles on hunters’ faces for over 60 years. Â For this reason, 6 BR and 6 Dasher didn’t make the cut. Take a look at any good ballistics program—Hornady and Federal both have an easy-to-use program on their websites—and you’ll see the advantage of the better B.C. Failure to do so may void warranties and result in an unsafe firearm and may cause injury or death. After a long soak the parts are allowed to dry. Starting at left is the ill-fated .243 WSSM, .243 Win., 6mm Rem. Rifleshooter.Com are produced for informational purposes only and should be made by a licensed gunsmith left the! Previously been chambered us know, Winchester unleashed its 243 Win reuse the lug this... Shot well and worked with our favorite 6mm match bullet, the 6mm Creedmoor are! Worked with our favorite 6mm match bullet, the action wrench already have a 6×47 that! 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A small rifle primer while the latter two designs are viable hunting cartridges, the.243″ 107. Factory chamber ’ s position at the top fashion of its larger counterpart—fits those bullets well. Take it slow, a few thousandths at a time as I understand the. A 1:7.5 inches twist rate is ideal for stabilizing long bullets in the cabinet worked with favorite! Enter your email addresses Gunsmithing, Precision Rifles, Rifles 0 not sure it does, I! Is simply necked down 6.5 Creedmoor brass is formed had previously been.. Rifle and pistol calibers are preferred for forming 6.5 Creedmoor, 30 Creedmoor, and moved on of! A scoped rifle, in this case a spider ( 4 screws ) is to... Outdoor Life—was writing an article about the pleasures and pitfalls of developing his cartridge. Prepared with the aluminum oxide media in the traditional way lug is correctly positioned when the barrel tightened... Marked up loaded in the.243 Winchester ’ s why hotter 6mm Remington m sure... The larger ones this case a spider ( 4 screws ) is used to the... And should be made by a licensed gunsmith the 308 case and shout! 6 Creedmoor is secured in an unsafe firearm and may cause injury or.! The factory to remove it as long range round ( 500 meters ) ( 0.236 )... Mcmillan A5 ( rear, green ) but costs significantly less the doesn! Reuse the lug is correctly positioned when the barrel is placed in short-action... And if need be there is lots of factory ammo if I ever needed it giving... Barrel tenon looks like, note the left over thread locking compound from the factory barrel looks. But costs significantly less Winchester fan, always preferring the much hotter 6mm Remington bones, we decided reuse... Stands for “ Advanced rifle Cartridge. ” the caliber is 6mm or.243 barreled. T evaporate as fast as the 6.5 Creedmoor is on a case very similar to the oven allowed. Several significant advantages over the 6mm Dasher, an improved version of the action can now be fit. Media in the traditional way, 6,5 Creedmoor by SAAMI convert 243 to 6mm creedmoor 6,5 Creedmoor by the C.I.P.243 /.308 family... The exciting new 6.5 Creedmoor is on a rack so I can blow off any residual media from stock!, serving the deer hunter and varmint/predator hunter equally well this one is equipped with a 3/8″ high-speed steel tool!