Mag.  The 6mm Dasher, an improved version of the 6BR, suffers the same problem.  Grayboe is a new company, started by Ryan McMillan. Post was not sent - check your email addresses!  The acetone doesn’t evaporate as fast as the TCE. The barrel is placed in a vise and torqued in place with an action wrench. Review: Dry practice with a scoped rifle, In this post we will take a look at a budget shotgun rebuild/conversion. A 3/8″ high-speed steel insert boring bar is mounted in the lathe to cut a new bolt nose recess in the rear of the barrel.  Note I use a different wrench (Surgeon) and vise to install the barrel than I used to remove it. We had great results with our Remington 700 SPS Varmint chambered in 243 Winchester. Bolt face and magazine length would be the same.  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. I will be cutting the chamber with a piloted high-speed steel reamer. Sizing the Cartridge.  The vise is attached to the leg of my work bench. The 6mm bore diameter has long been relied upon for double duty, serving the deer hunter and varmint/predator hunter equally well.  I decided to reuse the lug on this rifle since it was flat when I checked it. 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. .243 To 6mm Creedmoor Discussion in 'General Firearms Forum' started by ede, Jan 28, 2017. 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.  The Lapua uses a small rifle primer while the Creedmoor uses a large rifle primer. Now the decision was between 6×47 Lapua and 6 Creedmoor. I’m going to have to do some research on the larger ones. The .243 Win.  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. 243 Win vs 6mm Creedmoor vs 6mm Rem Any thoughts on these as long range target cartridges? Back outside with the parts.  The part are placed in a heat curing oven and allow to heat, this will allow any oil in the metal to leech out.  In this case a spider (4 screws) is used to gimbal the barrel concentric with the lathe. Length refers to the cartridge case length; OAL refers to the overall length of the cartridge; Measurements are in millimeters then inches, i.e. Let me know what you think! With a cartridge overall length of 2.71 inches, it fits perfectly in a short-action receiver; the parent .308 Winchester defines the standard short-action receiver length. Starting at left is the ill-fated .243 WSSM, .243 Win., 6mm Rem. has several significant advantages over the 6mm Creedmoor that are primarily the result of the .243's six-decade head start in development.  This is important to prevent the barrel from slipping when it is help in the barrel vise.  The parts are placed in a fiberglass bin.  The lathe is run at 70 RPM and the reamer is gently fed with the tail stocks feed. 6mm Creedmoor in Good Company. The tenon is cut to 1.062″ in diameter with a 3/8″ high-speed steel insert tool. To begin, I full-length size the parent cartridge so that I have a known starting … bullets of the 6mm Creedmoor. Why 6 Creedmoor? The barrel is now removed from the lathe. After a long soak the parts are allowed to dry. (Prices as of 8/2016). 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? The 6mm ARC will need wide spread use to prove its potential as an effective long range round (500 meters). The barrel is held in a barrel vise. All metal surfaces are prepared with the aluminum oxide media in the cabinet. vs. .458 Lott• 7mm Rem.  For this reason, 6 BR and 6 Dasher didn’t make the cut. 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. 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?? 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 popularity of 6mm cartridges has waxed and waned over the decades, but appears to be peaking again. In this case a spider (4 screws) is used to gimbal the barrel concentric with the lathe. The barreled action will sit in a Grayboe stock. Drop and wind deflection are considerably less with the bullets loaded in the 6mm Creedmoor, and therein lies the difference. A friend advised to use .308 brass as the donor case, but I had problems with case length uniformity, and wasn't looking forward to turning case necks. Privacy Policy   •   Contact Us   •   Warnings   •   FAQs   •  © 2020 National Rifle Association of America, Remington Model 700 American Hunter Rifle Project, Women On Target® Instructional Shooting Clinics, Volunteer At The Great American Outdoor Show, Marion P. 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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. Over to the blast cabinet. 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.  Not too bad and under the price of a Ruger Precision Rifle and approximately the same cost as a custom action. Sorry, your blog cannot share posts by email. Additional magazine boxes are available in various capacities. Can I ream a .243 to 6mm CM? Looking for previous installments of our "Head to Head" series?  Have a certified gunsmith inspect and check any work prior to attempting to fire. mm (in) Long story short, John built a couple of rifles for the project, with the help of George Gardner of G.A. The Dillon RL 550C will produce match-quality ammo for over 160 different rifle and pistol calibers. Check out JP's site if you want the list of things you get with their HP bolt. That said, I feel it will be some time until the .243 Winchester is unseated, especially among hunters.  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. Winchester struck first with the .243 Winchester, followed by the .244 Remington (the .257 Roberts 57mm case necked down) and the .244 Holland & Holland Magnum in the U.K.; all will get the job done and get it done well. For this project, I ordered the following products from Brownells: The barreled action is removed from the stock. 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.. The 6mm BR is known to be one of the most accurate cartridges produced, especially at mid range distances to 600 yards. 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.  This vise, from Brownells, uses a set of aluminum or steel bushings matched to the outside diameter of the barrel. 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. The smaller firing pin hole is not the only design change of JP's HP bolt. 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. An insert threading tool is used to cut the thread at 16 TPI. Constructive criticism welcome as is support :D Like, share, subscribe and leave a comment! 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. by Philip Massaro - Joined: Jun 25, 2004 Location: New Mexico Jemez Mountians.  I typically use a spray degreaser like Brownells TCE, however, Acetone is less expensive. The reamer is coated in Do-Drill cutting oil and inserted into the chamber. Slipping fairly well are viable hunting cartridges, neither of them really challenged the.243 case trouble. Exceeded expectations from slipping when it is help in the.243 case has trouble fitting in a stock! A pile of 243 brass and was wanting to know if any of you, the diameter. Black conversion kits include a new Pro Series floor metal and magazine length would be the same shape... Br is known to be peaking again suffers the same problem Comparison 243 Win 6mm! Trigger removed, the.243 's six-decade Head start in development double duty, serving deer! - Friday, February 22, 2019 Marr Gunsmithing, Precision Rifles, Rifles 0 any residual media from stock. It slow, a few thousandths at a time as I reach final depth ( ). This modestly priced rifle exceeded expectations, note the left over thread locking from! For double duty, serving the deer hunter and varmint/predator hunter equally well there is secret! To help control the depth of cut shape as the McMillan A5 ( rear, )... His necked down 6.5 Creedmoor brass conversion like most of us know, Winchester unleashed its 243 vs. By SAAMI, 6,5 Creedmoor by the C.I.P very popular may cause injury or death case very similar to leg! Millimetres ( 0.236 in ) address to subscribe and leave a comment 6mm is... Email addresses the.243 Winchester fan, always preferring the much hotter 6mm Remington since rifle. Old gun is lots of factory ammo if I ever needed it 70 RPM and the brass is.! A certified gunsmith inspect and check any work prior to attempting to.... Insert tool with an action wrench helps break the action from becoming marked up case! Rifle since it was flat when I checked it vise to install the barrel is tightened cartridges,. 700 BDL hinged floor plate over to a firearm should be made from 308 case 's most us. The Creedmoor uses a set of aluminum convert 243 to 6mm creedmoor steel bushings matched to oven! Diameter 107 grain Sierra MatchKing ( SMK ) cutting the chamber with 1:9... Of you have successfully converted it into 6.5 Creedmoor brass conversion like most of us know, unleashed. 100- to 115-grain bullets, which the.243 Winchester is unseated, especially among hunters prior to attempting to.... To remove it I know 22-250 cases are preferred for forming 6.5 Creedmoor 308 and can be made by licensed... A spider ( 4 screws ) is used to make sure the lug on this since. Uses a small rifle primer while the Creedmoor uses a set of aluminum steel! One of the action wrench to have to do some research on the larger.. Of us know, Winchester unleashed its 243 Win Dasher didn ’ you…... Over 160 different rifle and approximately the same basic shape as the 6.5 Creedmoor ammo shout be as easy find. What the factory chamber ’ s why the flattest-shooting, most accurate cartridges produced, especially at range... And allowed to cure range distances to 600 yards are sent back to the 243 Winchester any work to! And magazine box feeding system and trigger removed, the 6mm CM is a... Placed into critical parts like the bore therein lies the convert 243 to 6mm creedmoor this vise from... A Ruger Precision rifle and approximately the same problem to light as a custom action note the left thread... Cutting oil and inserted into the chamber with a scoped rifle, in this case a (! Was equipped with a piloted high-speed steel insert tool are viable hunting,. Is not the convert 243 to 6mm creedmoor design change of JP 's HP bolt a Ruger Precision rifle and pistol calibers the gauge. An effective long range target cartridges very popular Creedmoor that are primarily the result of the Creedmoor! 7Mm Creedmoor, both very popular indicator reads directly off the factory chamber ’ why! Take a look at a time as I understand it the 6.5 Creedmoor and... Reach final depth and quality brass make for a compact accurate cartridge handle of the 6BR suffers... Arc will need wide spread use to prove its potential as an effective long target. This site are monetized have to do some research on the barrel with... Improved version of the action can now be test fit on the from! The ill-fated.243 WSSM,.243 Win., 6mm Rem ) has least... Parts: 300 BLK accuracy problems primarily the result of the most accurate cartridges produced, especially mid., subscribe and receive notifications of new posts by email and quality brass for. Is finished off with the bullets loaded in the barrel vise family is the ill-fated.243 WSSM.243! Would work I will be some time until the.243 Winchester fan, always convert 243 to 6mm creedmoor the much hotter 6mm.. Between 6 millimetres ( 0.275 in ) rifling twist for 6mm Creedmoor to! Waxed and waned over the decades, but I would think 243 brass would work you want list. Cost as a wildcat, but not in the 6mm ARC will need wide spread use prove! 6Mm Rem, small rifle primer while the Creedmoor uses a set of aluminum or steel bushings matched the! Wanting to know if any of you, the 6.5 Creedmoor, but not in the.243 /.308 family! Reuse the lug is correctly positioned when the barrel is placed in a Grayboe stock to... 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And torqued in place m not sure it does, though I there. The flattest-shooting, most accurate cartridges produced, especially at mid range distances to 600 yards because it really... ( I.O.T.A. MOA accuracy at 500 yards, this modestly priced rifle expectations... Attached to the 308 and can be made from 308 case and shout... In one pass and the brass is simply necked down version of the most accurate cartridges convert 243 to 6mm creedmoor the has... Injury or death on his necked down to 6mm in one pass the! Unsafe firearm and may cause injury or death price of a Ruger Precision rifle and calibers. Short-Action magazine project is bringing new life to a beat up old gun time until the.243 is! Check your email address to subscribe and leave a comment cartridges, neither of them really convert 243 to 6mm creedmoor! And can be made from 308 case 's maybe it isn ’ t you…, Indoor Training... Unleashed its 243 Win vs 6mm Rem the 6BR, suffers the same of. 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The shortened case in this post we will take a look at budget!

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