.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; height: auto; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }, Ultimate Reloader LLC / Making with Metal Disclaimer:(by reading this article and/or watching video content you accept these terms), This section is from my 6mm ARC Announcement Post. The 6mm ARC was built by necking down the 6.5 Grendel. The rifles Barrett supplied for the DoD are top-notch, but they are just a modified REC-7 DI. My sources tell me the 6 ARC was a very small order for a specialized unit requested by an obscure R&D group that works under the DoD (Department of Defense) umbrella. Full Member. Nearly two dozen rifle makers are already chambering for the round, including Browning, Proof, Christensen, Barrett, Mossberg, and Howa. Developed by Hornady in concert with Proof Research and Barret Rifles, the result is a SAAMI spec and full support. Ok from the perspective of one 6mm ARC lover. Above: 6mm ARC case capacity measured 33.96 grains H2O. This data and these techniques can not be assumed to be safe. The ARC seems to be knocking on the heels of a BR. For a better experience, please enable JavaScript in your browser before proceeding. In very simple terms, the 6mm ARC's exterior ballistics exceed . You may know one or two more. 22420 C.O.L. Dropped on my M16 lower doubles and triples stayed on a full-sized silhouette out to 25 yards, stretched doubles to 50 yards. Poll: Whats your number one reason for reloading? You'll need a new barrel, bolt, and mags. In between: Everything performed swimmingly between 100-400 meters as they should, once again the ZEV shines here with no recoil and consistent accuracy, almost boringly easy to get hits. H4895. [5], The cartridge makes use of 6mm (.243 in) bullets, which are known for their high ballistic coefficients due to the high sectional density with less drag and better energy retention at extended ranges. (Ret.) Larue Tactical two-stage, small parts are Seekins, the stock is an LMT. Based on my best estimation, my H-4896 108 ELD-M load would produce approximately 2,754 FPS in a 24 bolt-action rifle. Material connection (partnerships) information available at http://ultimatereloader.com/about/, 6mm ARC is so new that as of the writing of this article, published load data did not exist! ZEV cleaned house using the David Tubb DTR reticle. The .240 Wby. The 6mm Creedmoor and it's smaller siblings like the 6mm Dasher, BR . 2023 Outdoor Sportsman Group. However, the 6mm ARC will service the military and civilian shooters more often in AR-15-type rifles, meaning barrel lengths will likely be closer to 18 inches. wasnt the only knife in the drawer, even if it was the sharpest one. was introduced in Remingtons Model 722 short-action bolt gun, and while the Model 722 was a very accurate rifle, it was rather plain. The 24 Nosler is exceptionally accurate and mild mannered and has cleanly taken numerous midsized big-game animals. They run the gamut from tiny benchrest numbers to those with larger cases that essentially duplicate many factory rounds. With this testing behind me, I must say it was fun, I enjoyed it and will keep testing as new ammunition is available. Looking at putting together on of lower powder capacity 6mms in an effort to possibly extend barrel life a touch and have a nice smooth/easy shooting gun. continues to ride the crest of the 6mm-caliber wave, the tried-and-true 6mm Rem. It debuted in 1955 and has been immensely and justifiably popular ever since. It is based on the .308 Winchester case, necked down with no other change. The 6mm CM at 300yds is 2514 and 1446 and 6mm ARC is 2288-1197. Twist rate is 1:7.5 to stabilize the long 105- to 108-grain high B.C. Each session started with a cold shot at 100 meters confirming zero while showing repeatability out of the bag. Whats the plus delta on each? Due to the lower MAP, the performance of 6mm ARC ammunition loaded to gas-gun pressures will, on average, be less than firearms loaded to bolt action pressures when using the same barrel length. The 6mm GT easily attains more than 3,000 fps. Given the need for a centered shot on a 6 roundish target from 100 to 300 meters, I would take it without hesitation. by David Bahde | Dr. VLD Match. The high B.C. Typical social media and industry speculation fired up with a fury. The biggest differences between the 6mm PPC and the 6mm ARC are the shoulder angle (30 for 6mm PPC, and 40 for 6mm ARC), and the base-to-datum spec for the shoulder (6mm ARC is pushed back further). The short reality is somewhat different. Mid-20th Century 24-calibers shoot much faster than the new Hornady 6mm ARC, but are they ballistically better? You might be surprised to discover you've come out on top! The 6mm ARC cartridge is a new SAAMI-spec cartridge based on the 6.5 Grendel case necked down for 6mm bullets, with the shoulder moved back 0.030. Full house loads will likely burn about 27- to 29-grains of suitable powders such as H4895, Reloader 15, and AA 2520, so handloads should be relatively inexpensive to build. The 6mm ARC is a more aerodynamic bullet than the 6.5 Grendel. Straight-wall rounds like Winchesters little 350 Legend may be the only centerfire rifle cartridges legal for deer hunting in some states, so of course theyre going to be popular. No surprise there since it is about the same weight as the 6 ARC and both used Proof Research barrels. I have handloaded the .243 Win. Consistency remained about the same with 2 or 3 out of five the norm. The 6mm ARC does what much larger cartridges can and everything that smaller cartridges can't. It delivers substantially better ballistics than the 223 and offers a much lighter gun/ammo system with 30% less weight than the AR-10/308 Win system. The content on this website (including videos, articles,ammunition reloading data, technical articles, gunsmithing and other information) is for demonstration purposes only. You are using an out of date browser. But I wanted to get some real-world results with my new CMMG Endeavor 300 6mm ARC AR-15 published as soon as I could, and therefore embarked on an exciting journey. And just in case some hunter wanted to knock off a deer with his .244 rifle, the company also offered a 90-grain loading. bullets from the magazine and not be limited to being a single shot. According to some of the PRS crowd it lets you spot shots through your scope. I had a heavy-barreled Sako single shot in the 1970s, and it shot like almost all 6mm PPCs: great. Federal has created a safer, easier and more reliable way to shoot a muzzleloader. In a 10-mph crosswind the 6mm ARC 108-grain bullet drifts 10.9 inches at 400 yards. Thankfully most bantering moved back to more pressing issues like high demand (and low supply) of firearms or ammunition and that pesky election coming up in a few short months. For those using 6.5 Grendel, its a 5-minute barrel change. It is advanced for the AR platform. I'm thinking most, if not all of these are bolt actions, but there are plenty of AR rifles ready to chew up a few thousand 6mm ARC rounds for you. That doesnt take anything away from what the 6 ARC does and the companies who developed it. This colored our perception of lower velocity rounds. (Maybe in 6mm ARC? In simple terms, its essentially a 6mm Grendel with the Creedmoor treatment, alterations to the shoulder and casing for better feeding, more consistency, and ease of mass production. Making those tweaks often feels like creating a powder that doesnt really exist. There is no magnum behind those titles, yet they are fastest or close to fastest in their calibers. With more case capacity, the 6mm BR can drive the heavier, higher BC bullets needed at long distance. Soft-report, low-recoil cartridges prove ideal for starting new shooters, many of whom never see the need for escalation. That wont change and logistically the 6 ARC is still at baby steps. Read on! However, after completely missing five consecutive bucks with my 6mm, I decided that I needed to hunt with that Remington 6mm like I hunted with my 2-3/4 inch 12 gauge. The 6mm Advanced Rifle Cartridge (638mm), or 6mm ARC for short, is a 6 mm (.243) caliber intermediate rifle cartridge introduced by Hornady in 2020, as a low- recoil, high- accuracy long-range cartridge, designed for use in the AR-15 platform at request of a specialized group within the U.S. DoD for its multipurpose combat rifle program. Team Hornaday is the master, bar none. 6mm ARC: Fact or Fiction? shoots the same cadre of 0.243-inch bullets as the .243 Win. With the 6PPC you have to turn necks and fire-form the cases from smaller 220 Russianbrass. Second, it was chambered in the delightful Winchester Model 70 Featherweight, which was a major factor in the .243s huge success. Required fields are marked *. Because it fires heavier projectilesup to 110 grainsthan the 5.56 at velocities up to 2,800 fps, the 6mm ARC has the ballistics needed to vastly improve the performance of AR-15 rifles without a lot of added weight. was not, and the .243 Win. Factory match rounds start at 155 grains and go up. The 6mm Rem. Posted: 11/11/2012 6:04:07 PM EST [#2] Velocity with a 105gr bullet from both is 2750 fps. Remington surmised that the .244 would be used mostly as a varmint cartridge, with only an occasional application on deer-sized game, so the initial factory ammo was loaded with a 75-grain bullet. The original 6 mm/.244 Rem is basically the .257 Roberts/7x57 case necked down, while the 6 mm BR Rem/Norma (only slightly different case specs between them) are much shorter cases. $1.75/Round. projectiles make up for their lower MV with less wind deflection, the toughest variable to battle at long range. Hornady is an obvious first choice for selecting 6mm projectiles to load the 6mm ARC with. The IRMT upper locks the barrel in place with unparalleled rigidity. So adopting the cartridge should be, for many shooters, convenient and affordable. An eighteen-inch barrel, maybe even a. Cal December 9, 2018 Leave a comment. This rifle is optimal for 6mm ARC because of the 20 barrel length, and the 1:7.5 twist rate. Again using QuickLoad, I developed the following load: Here I saw velocities averaging 2,631 FPS. Its release as a commercial round was presaged by a number of successful 6mm wildcats like the 6mm AR based on the Grendel. Lower velocity means less flame and heat for longer barrel life. Geissele fixed gas block was retained with no change in brass ejection pattern or bolt speed. Yes it is designed to run in AR15-platform rifles. Sneak Peek of Bryan Litz's New Book: Volume III of Modern Advancements in Long Range Shooting. Clearly better to galivant around the countryside with then an AR10. Slower, sure, but not enough to matter in the real world on real threats. Editors Note: Looking for a deeper dive on the 6.5 Grendel vs. 6mm ARC? just get a 6mm hagar. The benchrest crowd has not been overlooked in the 6mm derby, and one cartridge literally rewrote the record book. Mag., the 6mm-204 essentially recreates the 6x47. The difference between the 6 mm BR Rem and the 6 mm BR Norma are slight, but in a tight chamber . Our real questions are (A) What is the 6 ARC, (B) What does it do, and (C) is it doing something better than what you already own and love? There is no reason that it shouldn't, it is basically a blown out 6mm PPC which is probably the gold standard for accurate cartridges. But do you know how to properly use them? Dr. Wait a minute. It's wearing a, Finally, we started seeing heavy, high B.C., very low drag bullets that improved trajectories by minimizing drag and conserving energy. It has had moderate success in various target venues. The Mossberg 500 Pump Action Shotgun is one of the most popular home defense shotguns on the market. 6 BR REM, not 6.5. I did a ladder test one time at 300 meters on an electronic target, the Norwegian ones that have verified accuracy. 6.5 Grendel The 6mm ARC delivers comparable performance from a wider assortment of bullets, making it a more versatile choice. Modern Outfitters MC7, Proof Research 22 6CM, Bushnell Elite Tactical XRS 4.5-30, Hornady 108 grain ELDM. Cleaned it all but twice missing one cold shot at this range. Important to note that Quickload reports the chamber pressure using the combination of components above is 3900 PSI over SAAMI spec and is therefore a dangerous load that should not be used. The 6mm ARC is designed to run in existing in M4 rifle platforms. This means you have the option to read your magazine on most popular phones and tablets. But the 6mm ARC drops 22.2 inches. For example, the data in the Hornady 11th Edition Manual for an 18 in (457 mm)-barrelled AR-15 platform firearm was on average 200-300 ft/s (60-90 m/s) less than the data for the 24 in (610 mm)-barrelled CZ 527 bolt action rifle. bullets. 'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs'); 2023 Copyright 2023 Ultimate Reloader LLC. Some have long and storied histories, while others are just now making their own legends. Velocity can be a factor, but given the same weight, recoil should be similar so I kept the weights as close as possible. As such, SAAMI maximum average pressure is set at a relatively mild 52,000 psi. Use load data at your own risk. Poll: Where are you finding reloading primers and powder? The rim diameter of the 6mm ARC is 0.441 inches, while the 243 is slightly larger at 0.471 inches. The 243 has a case length of 2.045" compared to the 1.49" of the 6mm cartridges. I don't know the velocity, but I suspect something under 3k. However, the 6mm BR is superior at 300m and beyond. Travis224 Sergeant. Take a look at any good ballistics program Hornady and Federal both have an easy-to-use program on their websitesand you'll see the advantage of the better B.C. You can get the 6XC brass in Norma which is very good. WT?, Tactical Time Lord. Also 6X47 has also interested me. ELD (l.) makes for an excellent long-range target round, while the 103-gr. The 6 ARC proved at 2720 fps with a Density Altitude of 8800 feet. (roughly .530 to .540 B.C. After entering my measured capacities, measured muzzle velocity with 27 grains of VARGET under the 108 ELD-M of 2554 is now within 2 FPS of Quickloads estimated 2552 FPS. It is based on the 6.5 Grendel case, and time will tell if it, too, becomes one of the great ones. I followed up with three at 300 meters and a 600 Meter shot on a 22 x 16 silhouette steel. Retested today with 26.3 grs. VLD, Hornady 108-gr. You will not find better quality and consistency when it comes to Lapua. It started as a popular wildcat before its approval by SAAMI. bullets. The 6.5 Creedmoor shoots 6.5mm/.264 class projectiles while the 6mm Creedmoor is necked down to shoot 6mm/.243. Some have stated that it offers comparable ballistics to larger 6 mm cartridges like the 6mm Creedmoor and .243 Winchester, but out of a smaller cartridge, however this simply is not true when comparing muzzle velocities between them. Legend, 450 Bushmaster. Its almost boring. Not only did the rifle have a nice checkered American walnut stock, but also the light barrel was a handy 22 inches long. While it did well the clear winner was the 6CM, high BC and extra velocity are hard to overcome at this range. I tested a bolt-action handgun in 24 Nosler last year and was so impressed with the round that I had a Remington Model 700 originally in .223 Rem. SPC, 350 Win. In my mind, if 6BR would readily fit in a small frame AR there would be no reason for 6ARC. H4895 with 5-shot groups from the high .5s to 1.0 MOA. For now, though, it is anything but a sea change amongst the broader Special Missions Units. Once lasers hit the fields, the game began to change. Powder selection is easy: Just stick with CFE 223 and all will be right with the world. I purchased a 6mm ARC barrel from Brownels when they first came available. LMT MWS, 20 224V, Sig Sauer Tango 6, 3-18 MRAD Dev-L using Federal GMM 90 grain SMK and an 18 SS Match 6.8 SPC with 110 Grain VMAX. Hornady found a solution with the 6mm ARC. Will it supplant mainstream calibers? This 6 ARC was an excellent performer, not a precision rifle but thats not what its for. The Zev Technologies .223 is still the most fun you can have with an AR out to 600 meters. of H2O, almost right inbetween a 6 mm PPC, around 32 gr. If you already have an AR chambered in 6.5 Grendel, the ONLY thing you need to change is the barrel. MV consistency matters a great deal at extended ranges. It still turns the steel and is very consistent holding 9 mils at the top. The 6mm ARC is a medium-power cartridge comparable to the 6.5mm Grendel, but with better ballistics thanks to the greater muzzle velocity achieved by using lighter 6 mm bullets and enough power to make use of the heavy 6 mm bullets. Thread Modes. Those held a water weight of 34.74 grains with a SD of .14 grains. First, the cartridge was designed for dual purposes: deer hunting and varmint hunting. They held a very consistent 34.58 grains of water. [9] The 6mm ARC utilizes the same bolt head size as the 6.5mm Grendel, and 6.5mm Grendel-compatible AR-pattern box magazines have also been used successfully with the 6mm ARC. I tried a test one time after that ladder test, I decided to eyeball the powder amount in the case. Maximum Cartridge Overall Length is 2.26. Required fields are marked *. ELD-Match, and Berger 115-gr. Your email address will not be published. Using QuickLoad, I worked up the following load: For this load, I shot a group of 5 shots on the chronograph, and observed the following: This load produced very mild indications of pressure on the case rim, and functioned in the rifle well. Mikey Hartman, Lt. Col. .563) from wobbling, the 6mm ARC will need at least a 1:7 twist. bullets in .243" help make the light-kicking, short Hornady 6mm ARC ballistically superior to the 308 Win., 6.8 SPC. Ever since the 6mm ARC came out I've been stuck on the idea of building one as a bolt gun trainer, specifically on a Tikka action. Its a 6mm cartridge similar to 6.5 Grendel, built for the AR-15 platform, Its optimized for bullets in the 103 grain 110 grain range, Its got more velocity and less recoil compared to 6.5 Grendel, It shares the same parent case with 6.5 Grendel: The 220 Russian, Its capable of launching a 6mm 108 grain projectile approximately 2800 FPS from a 24 barrel, BARREL: 20, 1:7.5 twist, 6mm ARC, MT 416SS, SBN, MUZZLE: MUZZLE: SV Brake, threaded 5/8-24, GAS PORT LOCATION: Rifle Length with SLR Adjustable Gas Block, RECEIVER: Forged 7075-T6 AL M4 type upper, AR15 type lower, FINISH: Cerakote Receivers and Hand Guard, Find a cartridge similar to 6mm ARC thats supported in the, Determine the 6mm ARC case capacity for my lot of brass (H2O method), Adjust Quickload model for case capacity and any other factors, Model loads looking at pressures and velocities (using 6mm PPC load data as a backup sanity check), It shares the same parent case with 6mm ARC (the 220 Russian), Its case capacity is very close (1.9 grains of H2O different), Likely in reference to a 24-ish test barrel, No AR gas system present to reduce velocity, Start with observed 20 velocity data for my H-4895 load (2,631 FPS), Look at the QuickLoad projected velocity difference between a 20 and 24 barrel, Add the velocity difference to the actual measured velocity, Account for ~1.18% reduction in velocity (calculated from my 224 Valkyrie AR-Bolt side by side testing) due to the AR-15 gas system, I had limited components available to test, results could get better from here (more velocity with less pressure), These loads may be hotter than what will function reliably in a typical AR-15 (and may not be safe), I will follow up with testing of Hornadys factory ammunition with the 108 grain ELD-M bullet. Arguments amongst experts (real and self-delusional) spewed forth with ferocity. All of these are heading in the opposite direction. bullets for the Hornady 6mm ARC. 1,461. Long-range precision shooting is one of the fastest-growing segments of the shooting sports. rebarreled to 24 Nosler with a stainless-steel, three-groove PAC-NOR barrel. Shots were aimed from a bi-pod, the rifle on the bench with me standing behind it. In the 1970s, Remington experimented with a .308-sized case that was about 1.5 inches long and had a small primer pocket (like the PPCs). Learn more here: http://bit.ly/1G7xXag. 1100m: This is more academic than real, but they claim 6mm ARC performs at this range (compared to the .223 and 308). Honey Badger, XM2010, C22, R4, MSR, CSR, AAC, BARNES BULLETS (https://www.youtube.com/watch?v=ykTfyrMiXps). In an effort to salvage the .244 Rem., in 1963, Remington changed the name of the round to 6mm Remington and the barrel twist rate to 1:9 inches. Ill be publishing a full overview story covering this rifle, but in the meantime, here are some specs from the CMMG Product Page: CMMGs ENDEAVOR line of rifles are now available in Hornadys new 6mm ARC (Advanced Rifle Cartridge). Given this or your typical AR10, no contest, the 6 ARC is much easier to carry. I was lucky enough to get my hands on one of the first CMMG Endeavor 300 6mm ARC AR-15 Rifles, and it has been awesome to shoot! The .223 does have advantages, though. I did not try to shoot past 900 today because of limited ammo and Applied Balistics indicates that at 2550 FPS MV these 108s are going transsonic just past 900 and I didnt want to waste the last few shots. Some examples include the 6mm-204 and the 6x45. Poll: What Rifle Cartridge Do You Reload Most Often? Recoil is subjective and using the same bullet weight they were all close. It fits in an AR mag. Photo shows high B.C. The 6mm Creedmoorin the same fashion of its larger counterpartfits those bullets very well. 1,226. Real Performance Results, From-Scratch Experimental Load Development, 6mm ARC Landing Page at Midsouth Shooters Supply, Subscribe to Ultimate Reloader Reloading Blog by Email, NEW DAA Infra-Red Low Powder Sensor (Hands-On). Guns & Ammo's first sample rifle chambered in 6mm ARC was a Ruger AR-556 MPR with an 18-inch barrel. When comparing 6mm ARC vs. 6.5 Grendel, you simply must ask, Will it do something your 6.5 Grendel wont? Not that I can see. The newest 6mm factory round is the recently announced 6mm ARC (Advanced Rifle Cartridge). Its all about the lack of correlation between mapping out rounds on a computer and sending them downrange at targets measured in yards. Facebook; Twitter; Pinterest; Related Articles. Using already available magazines, bolts and the AR15 platform is a big plus. And its performance is effective with a variety of bullets. A memorized trajectory curve combined with a ballistic reticle or turret dialing could compensate. But on paper it looks promising. August 14, 2022. All of the eyeball'ed loads produced sub-MOA groups. The 6x45 is the .223 Rem. Copyright Ron Spomer Outdoors document.write(new Date().getFullYear()) In 100-200yd benchrest competition, the 6PPC is still the "winningest" cartridge around. Unlike the WSSM, the Hornady 6mm ARC was engineered around a long, high B.C. Handloads are easy to prepare, and while my limited use of the .240 Wby. These did not shoot well at all for me at 100 yards with an average of 1.9 MOA and after two lackluster 5-shot groups, I discontinued testing with them. There are probably better choices in a bolt gun, The 6 BR Rem has been around for a while but not fifty years, yet. The deer load had a 100-grain bullet, and the varmint load carried an 80-grain bullet. : 2.095" G1 B.C. Jeff, I would have it fluted well to reduce weight and chop +/- 20" - with 95 BTs, it will be a deer slayer, varmint bullets for said creatures. Closer to 43, I think. Low recoil is also noted. So far, I have not laid my eyes or hands on a single 6mm ARC cartridge or rifle, so I will withhold judgment until I test one. A World Record Attempt and everyone is out at the range shooting and practicing.
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