By accepting these terms, you agree that you alone are solely responsible for your own safety and property as it pertains to activities, procedures, techniques, or practices described in whole or part on this website. The 24 Nosler is exceptionally accurate and mild mannered and has cleanly taken numerous midsized big-game animals. Standard practice is to start tweaking burn rates, bullet weight and weighting factor to make calculated muzzle velocity match actual. The 6 ARC proved at 2720 fps with a Density Altitude of 8800 feet. It will be interesting if they chamber this in micro-action bolt carbines like the Grendel has been. wasnt the only knife in the drawer, even if it was the sharpest one. Hi Gavin, Clearly better to galivant around the countryside with then an AR10. of H2O, almost right inbetween a 6 mm PPC, around 32 gr. This made sense. So, the 6mm ARC outperforms any magazine length 5.56x45mm NATO load simply through a combination of sheer horsepower and more efficient projectiles. Photo Courtesy Berger Bullets. And its performance is effective with a variety of bullets. it looks like the 6mm ARC is 1.490 and the grendel case is 1.52, so not much of a shortening if really at all. As for the 6ARC, I would take a vital shot at 600 meters without hesitation given a solid platform. A World Record Attempt and everyone is out at the range shooting and practicing. Those I know that can pick their own stuff are still proving out the 224V and many like it, not sure the differences are enough right now, time will tell. Another cartridge that deserves mention is the relatively new 24 Nosler. Then the AR-15 platform exploded and the game changed some more. They still do. The 6mm ARC uses commonly available 6.5 Grendel magazines/bolts. Minuteman. While this excellent cartridge was almost doomed at birth, it has hung on, to the chagrin of deer, prairie goats, coyotes, and rock chucks everywhere. 6.8 SPC The 6mm ARC has more match bullet options and is a better long-range performer. 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. . 6 BR REM, not 6.5. I'm a 6.5x47 lapua man myself. 6mm BR vs 6mm BRA vs 6mm Dasher - PrecisionRifleBlog.com 6mm ARC: Fact or Fiction? Real Performance Results, From-Scratch I think the point of the arc is that it works in an ar 15. Many handloaders like the 6mm Rem.s sharper shoulder and longer case, and while its not nearly as popular as the .243 Win., it is nonetheless a great 6mm round. Overall, the 6mm ARC delivers optimum all-range performance and barrel life. Low recoil is also noted. There aren't any markings on the barrel, but it was advertised as being a 6 BR REM and the reloads that came with it seemed to chamber fine when the barrel was still attached to the action. 6mm ARC vs .223 Rem: Cartridge Clash - RifleShooter bullets for the Hornady 6mm ARC. All Shooting Times subscribers now have digital access to their magazine content. What about your 6.8 SPC? You can boost the performance of the 6mm ARC in a bolt action quite easily. Sort by. Head to Head: .243 Winchester vs. 6mm Creedmoor | An Official Journal It would seem to make a dandy handgun round as well. Do you load for a Uintah Precision bolt upper? Quickload can be frustrating when there is more than 10 FPS difference between calculated and measured MV. This is, after all, a rifle forum and accuracy matters! The 6mm ARC is designed to run in existing in M4 rifle platforms. Low velocity coupled with relatively light bullets reduces recoil. 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). I know what. Hornady 6mm ARC - First Look - Guns and Ammo The Eagle Eye 6.5 Creedmoor shoots a 130gr hybrid projectile with a .295 G7 at 2,960fps from an average 26" barrel. That was the era of increasing muzzle velocity. While almost any combination of components seems to shoot well, my favorite powders are Hybrid 100V, Reloder 17, and Power Pro 4000MR. Posts: 38 Threads: 10 Joined: Aug 2020 #1. 6mm ARC The newest 6mm factory round is the recently announced 6mm ARC (Advanced Rifle Cartridge). Factory match rounds start at 155 grains and go up. It gave dependable accuracy and high velocities. Cal December 9, 2018 Leave a comment. Eight reasons to embrace the Hornady 6mm ARC and other low-velocity cartridges. Joseph Von Benedikt is with Rafe Nielsen of Browning to take a look at a new X-Bolt series rifle. With the release in 2020, Hornady also launched three factory loads with 103,105 and 108gr (6.7,6.8 and 7.0g) bullet weights and advertised G1 ballistic coefficients of .512, .530 and .536 respectively.[6]. rebarreled to 24 Nosler with a stainless-steel, three-groove PAC-NOR barrel. The 6x45 is the .223 Rem. After consulting Quickload, I also shamelessly lifted Gavins 27 grain VARGET load under 108 ELD-Ms. My Ballistic Advantage barrel is a little different than Gavins. 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. My wife has a Ruger American in 6mm Creedmoor, and it is the only round that has been able to pry her away from her beloved .270 Winchester. At 400 yards, it has an average bullet drop of 22.2 inches. Hold for elevation never changed, 4 mils at the top garnered hits at from 4.2-4.7 mils each time, misses were generally wind. The 6mm ARC is a 5.56-platform compatible cartridge, similar to the 6.5 Grendel. Slightly bigger still is the 6CM, which invokes much cooler H1000 powder (to best all these in barrel life). Between 600-1100 was a different story, everything but the 6.8 SPC did well out to 800 meters including the 6 ARC hitting with a bit more authority than the rest. And one may be all you need to justify a new rifle in a new, low velocity chambering. Check one out and join the race to the bottom. Probably the most recoil came out of the 6 Creedmoor. 6BR is the easy buttonstandard bolt face, top-quality brass, 30.0gr Varget under any 105-108gr match bullet to start. '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. 6mm ARC Ammo for Sale | Advanced Rifle Cartridge - OpticsPlanet Designed for superior long-range accuracy, the ENDEAVOR line features a 20-inch barrel so that you can squeeze out every drop of ballistic performance from this exciting new caliber. On this Wikipedia the language links are at the top of the page across from the article title. Each session started with a cold shot at 100 meters confirming zero while showing repeatability out of the bag. You are using an out of date browser. It was essentially the Huntington cartridge, but with a 26-degree shoulder for easier case manufacturing. Savage already offers a few more inexpensive options in 6mm ARC though defiantly not a mini action. The deer load had a 100-grain bullet, and the varmint load carried an 80-grain bullet. Image shows 243 Winchester, 6mm Remington, 240 Weatherby Magnum, older and faster than the Hornady 6mm ARC. H-4895 is closer to the 6.5 Grendel sweet spot, so I thought it would be worth a try. Some of the super short cartridges created to fit the increasingly popular AR-15 platform rifles with 2.26" magazine length. Were going backwards! It is a 6 BR REM barrel that came off a rifle that I bought for the Remington 600 donor action. 6mm ARC vs 6mm Creedmoor Shorty? | Long Range Hunting Forum 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. Head to Head: .243 Winchester vs. 6mm Remington | An Official Journal The general shooting public loves them for control of vermin like feral hogs. They built these rifles with great attention to detail. Image shows 6.5 Grendel cartridge, parent case of the 6mm ARC. Your email address will not be published. Just pouring powder in and checking it by eye. When using shorter barrels, which are common on gas-guns, the difference will be even more pronounced. 6mm GT: Is This the Newest Precision Ammo Niche? - Guns.com case necked up, made especially for ARs. You'll need a new barrel, bolt, and mags. Recoil is primarily a product of bullet weight. While it did well the clear winner was the 6CM, high BC and extra velocity are hard to overcome at this range. You can get a 6 to 6.5 pound rifle which can shoot high B.C. Making those tweaks often feels like creating a powder that doesnt really exist. At the moment, it remains a proprietary caliber with one source of magazines and ammo, unproven. Velocities were established from a 24-inch barrel. You can get the 6XC brass in Norma which is very good. Editors Note: Looking for a deeper dive on the 6.5 Grendel vs. 6mm ARC? I started out a skeptic, not terribly excited about the 6mm ARC. Any discussion of great 6mm cartridges must start (some would say end) with the .243 Winchester. The 6 ARC proved at 2720 fps with a Density Altitude of 8800 feet. Unless youre carrying this into combat, Im not sure it matters. Would love to get this thing shooting consistently under .5 with enough speed to reliably ring steel at 1000. Its 26-inch barrel made the rifle a bit heavy for toting over hill and dale, plus the 1:12-inch twist limited bullet weights to 90 grains or lighter. Mag. You might be surprised to discover you've come out on top! Retested today with 26.3 grs. Lets break down a few things about this number: So if you have a 24 bolt-action 6mm ARC rifle, thats the velocity you should expect. 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. Geissele fixed gas block was retained with no change in brass ejection pattern or bolt speed. 6mm ARC vs 6.5 Grendel - 24hourcampfire I had a heavy-barreled Sako single shot in the 1970s, and it shot like almost all 6mm PPCs: great. Accuracy was good, with one group I captured on camera (see video) measuring 0.750: I decided to see how fast a 95 grain bullet could be propelled by the 6mm ARC, so I turned to some 6mm Berger Classic Hunter bullets I had on hand, and Ramshot TAC powder. Hornady found a solution with the 6mm ARC. Savage Model 110 Timberline 6.5 Creedmoor Rifle: Full Review, SIG Sauer P365 Pistol Now Offered in .380. That flattens trajectories somewhat and applies a bit more punch to the game. Messages. You could get hits at 900 meters with all of them, 5 shot strings were easiest with the Creedmoors and they ruled at 1100 meters. can exceed it by 500 fps and the 240 Weatherby by 600 fps. Like the grendel though you probably don't want to run high pressures on an ar bolt though. The sudden popularity of the AR-15 platform rifle has inspired a flurry of new, short cartridges that fit its short magazine. These developments are interesting, and the supreme accuracy achieved by several of the wildcat cartridges make them worthy of mention here. It also produced the best accuracy as seen here: This load is a good performer, but I wanted to see if I could get more velocity from the 108 grain ELD-M bullets, so I tried a different powder! In very simple terms, the 6mm ARC's exterior ballistics exceed . Dropped on my M16 lower doubles and triples stayed on a full-sized silhouette out to 25 yards, stretched doubles to 50 yards. Played at other stuff with the 6 ARC but that was the bulk of the testing. Using 26 to 28 inch barrels in bolt guns, 6ARC may be easy for those that do not reload or have primers. There is no magnum behind those titles, yet they are fastest or close to fastest in their calibers. Another round that was designed for the steel shooters is the 6mm BR Remington. With more case capacity, the 6mm BR can drive the heavier, higher BC bullets needed at long distance. 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 Hornady manual states that this second set of data should not be used in gas-guns. 6mm ARC: Fact or Fiction? bullets of the 6mm Creedmoor. Facebook; Twitter; Pinterest; Related Articles. I tested dozens of loads, mostly with benchrest bullets, and the rifle shot well. This is the Great short, fat 6mm PPC that was developed by Dr. Louis Palmisano and Ferris Pindell. [10] The 6mm ARC therefore can also be a suitable chambering for shorter "micro-action" bolt-action rifles. The 6mm ARC is a brand new cartridge that Hornady designed to fit into a standard AR-15. Dr. Some tactics never die, they just get regenerated. I tried the hand loaded 27 grain Varget loads and they shot a pleasantly surprising .5 and .52 MOA group at 100 yards. This is fortuitous, as it is a delight to reload and seems to like just about all the bullets Ive tried in it. You are here: Home > AR Parts > AR-15 Parts > AR-15 Upper Parts > AR-15 Barrels > 6MM ARC AR-15 Barrels 6MM ARC AR-15 Barrels Showing 1 - 16 of 16 items Sort By: Go Page of 1 Will it supplant mainstream calibers? Travis224 Sergeant. This is because loading data given in some manuals such as the 11th Edition Hornady Reloading Manual[8] ,for example, has two sets of data. Just striving for accuracy. The release of the new Hornady 6mm ARC (Advanced Rifle Cartridge) supports the perception that gun and ammo makers are engaged in a race to the bottom. Maximum Cartridge Overall Length is 2.26. Every rifle is a proven performer to 1100 meters and an AR using the same or similar suppressor, no brakes, flash hiders or conventional suppressors. 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. I'm pretty sure that the dies were marked 6 BR REM. The 6mm Advanced Rifle Cartridge (6 ARC) by Hornady is a new cartridge that can fire a sleek 6mm (.243) caliber projectile around 2,700 fps with minimal recoil and the 6mm ARC is short enough to fit within the dimensions of a standard AR-15 magazine and it performs very well out of an AR-15 with an 18 inch barrel (what we tested). Todays fast-twist .223s and heavy bullets have made it effectively obsolete. Use load data at your own risk. It would also be used as a deer rifle for new shooters (small deer, sitka blacktails). In a 10-mph crosswind the 6mm ARC 108-grain bullet drifts 10.9 inches at 400 yards. Based on the .204 Ruger, which was created from the .222 Rem. The Barnes 80-grain Tipped Triple-Shock BoatTail sizzles with a velocity of 3,226 fps with a safe loading of VihtaVuori N550 powder, and the Speer 90-grain Hot-Cor can easily achieve 3,115 fps with VihtaVuori N160. Twist rate was one turn in 10 inches, which handled the 100-grain deer bullets nicely. Salmon River Solutions: Ulra-Light Brakes, Rails, and more, Area 419 Orange Vise Maintenance and Barrel Change Jaw Kit, Hands-On: Phodera Armory Hill Country 30 Caliber Suppressor, Rifle Reloading Basics Pt1: Safety and Brass Tumbling, NEW Dies from Area 419: M-Series Sizer (In-Depth), Perfect Primer Seating with Frankford Arsenal, RCBS Lightweight Partner Press Unboxing and Overview, TESTED: Double Alpha Academy Turbo Case Feeder, Unsolved: 44 Magnum Over-Pressure Mystery, RCBS Lock-Out Die Part II: Setup and Maintenance, RCBS Lock-Out Die Part I: Theory of Operation, Reloading Safety: Powder Check Systems Overview. 6.5 Grendel vs. 6mm ARC Ballistics. 2023 Outdoor Sportsman Group. Tested, selected and fielded by a specialized group within the U.S. DoD for its multipurpose combat rifle program, the versatile 6mm ARC does much of what larger cartridges can and everything that smaller cartridges cant. Range Report 6mm ARC vs 6 PPC vs 6 Grendel. 6 ARC Testing To set up a viable 6mm ARC vs. these other calibers, I set 100-meter zeros, then confirmed at 1100 meters providing a proven hold at range. The .244 Rem. Sneak Peek of Bryan Litz's New Book: Volume III of Modern Advancements in Long Range Shooting. 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. Copyright 2020 SHWAT | All Right Reserved. Poll: Where are you finding reloading primers and powder? All barrels will be . Once lasers hit the fields, the game began to change. Maybe in a rural area where ranges stretch out, but movement here will be a rarity. for decades and have experienced no odd problems with it. 260RemGuy: I began a five year long search (bribery fest!) LMT shot softer, exhibited a tank-like build, and proved great to shoot. Consider the 7mm, 300, 338, and 375 Remington Ultra Magnums. The cartridge is specifically designed to maximize performance in AR-15s with barrels between 12 and 24 inches. It is NOT for use in AR-15 style (gas gun) rifles. Ran great with solid and repeatable accuracy using the same bullets as the 6CM. I chose to start with Varget because of what I read about 6mm PPC, and I have a lot on hand! Maybe, if you are shooting farther out. 6mm ARC vs 6.5 Grendel - Performance Comparison - The Lodge at AmmoToGo.com He gave it a 32-degree shoulder and called it the .243 Rock Chucker.. Only a few metric calibers have been really popular in the United States6.5mm and 7mmso the Great 6mms are relatively few in number. You must log in or register to reply here. If you are looking for reams of data or ringing steel the size of a car move on, I am NOT that guy, you will be very disappointed. 6MM AR vs 6 BR | Shooters' Forum I tried a test one time after that ladder test, I decided to eyeball the powder amount in the case. Mikey Hartman, Lt. Col. 6MM ARC AR-15 Barrels for Sale at Joe Bob Outfitters! SPC; the 300 AAC Blackout, 350 Winchester Legend and 458 Bushmaster. Give a Gift 100-300m: Consistent 100 meter groups in the .60 -.75 inch range, 2.5-3.0 inches at 300 meters were the norm. Ok from the perspective of one 6mm ARC lover. Thread Modes. In 1955, on the heels of the .243 Win., the .243 Rock Chucker was modified slightly by Remington and became the .244 Remington. ELD-X . I had a 6mm Norma BR built on a Remington 700 and I could not get it to feed from the magazine. All of the eyeball'ed loads produced sub-MOA groups. WARNING: The load development techniques and load data shown in this video are experimental and are for DEMONSTRATION PURPOSES ONLY. I fall into the latter category. Powder selection is easy: Just stick with CFE 223 and all will be right with the world. 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. Their 106 grain TAP round looks interesting with a .580 G1 BC but not available right now, will have to come back later on that. For an ordinary AR-15 rifle chambered for the .223 Rem/5.56mm NATO, a new barrel, magazine and bolt are required to convert to the 6mm ARC. Hornady Precision Hunter 6mm ARC 103 Grain Jacketed Soft Point Centerfire Rifle Ammunition, 20, SBT (Save 10%) $2.15/Round. bullets. shoots the same cadre of 0.243-inch bullets as the .243 Win. That wont change and logistically the 6 ARC is still at baby steps. I don't shoot past 300 and dead is dead. Variations on a theme. projectiles make up for their lower MV with less wind deflection, the toughest variable to battle at long range. 6mm ARC Round, Too Little Too Late? - AmmoLand Shooting Sports News The Hornady 6mm ARC takes the 24-caliber into record territory the slowest muzzle velocity of any commercial cartridge propelling .243 bullets. It accepts all the same components as the Grendel, including the magazine and bolt, so all you need is a 6mm-specific barrel. Powered by UBB.threads PHP Forum Software 7.7.5. I had a Remington Model 700 BDL Varmint rifle rebarreled with a heavy stainless-steel barrel chambered for the round, and it lived up to its reputation. Follow @UReloader It uses the ever-effective Hornady 100-grain RN InterLock with H4350 powder. Factory ammunition at normal prices (if that exists anymore) suitable for defense, duty, target, and hunting is more available than similar calibers after decades of use. I did a ladder test one time at 300 meters on an electronic target, the Norwegian ones that have verified accuracy. I cant see it, but for those who like to try something different its is a really nice option. Ok from the perspective of one 6mm ARC lover. The only difference is the Proof Research 18 1-7.5 twist barrel, 6.5 Grendel bolt, and E-Lander magazines. Did not hit as hard but it was no slouch, anything it hit would notice for sure. 6mm ARC vs 243: The Low Recoil Rifle Rounds : r/ammo wasn't as big a fan of his 4 oz trigger but all in all I want one someday don't know enough about the 6 arc to comment on it . Thank you for this timely video. Second, it was chambered in the delightful Winchester Model 70 Featherweight, which was a major factor in the .243s huge success. Here I am shooting a Smith & Wesson M&P chambered 5.56x45mm. 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. 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). The case capacity of a 6mm AR is about 36 gr. The hunter can add about 100 to 150 fps of additional velocity to most game-weight bullets. The 6mm Creedmoorin the same fashion of its larger counterpartfits those bullets very well. That doesnt mean others in that community or those in contact with them may not want 6mm ARC someday, or even give it a try sooner than later. Always enjoy your videos. There are 6ARC bolt guns out there. I used the lathe to modify a 6.5 Grendel bushing die and ended up with a 6 ARC die. Read it here. It depends on numerous factors, including ammunition used, barrel used, and the shooter's skill, but in general, 6mm ARC is a more precise cartridge. With this testing behind me, I must say it was fun, I enjoyed it and will keep testing as new ammunition is available. [citation needed]. Doesn't the 6mm ARC have a smidge more powder capacity over the 6mm BR? Advantage, magnum. This isn't your grandpa's muzzleloading system. Interestingly enough, my history with 6mm rounds began with the 6mm Remington. A quality shooter can certainly compensate for 3 inches of difference, so while it's a victory for the ARC, it's a narrow win. Posts. This increased size means the 243 has a case capacity of 53-54.8 gr H2O. The 6mm GT easily attains more than 3,000 fps. Those who are going to like or prefer the 6mm ARC will likely appreciate the 6mm ARC for its utility in either the AR 15 platform & or the mini action bolt action rifles. Honey Badger, XM2010, C22, R4, MSR, CSR, AAC, BARNES BULLETS (https://www.youtube.com/watch?v=ykTfyrMiXps). Distance is its forte and with its 2020 introduction and ability to flatten the trajectory curve, the 6mm ARC might ought to have been called the "Corona cartridge.". Not only did the rifle have a nice checkered American walnut stock, but also the light barrel was a handy 22 inches long. A fun challenge. Barrel-length is an issue. Wildcatters have had a field day with the 6mms, and the list of their creations is long. The powder loads for the test spanned 1.6 grains and I fired 24 shots and only two were more than 1 MOA out. Company literature in 1955 described both bullets as Soft Point.. ARC stands for "Advanced Rifle Cartridge." The caliber is 6mm or .243. Designed to meet the needs of the worlds toughest critics, the 6mm ARC utilizes efficient, high-BC bullets to deliver unprecedented performance from the AR-15 platform. and 6mm Rem., but it pushes them a little faster. Hornadys 80-grain GMX and 103-grain ELD-X and the Speer 90-grain Hot-Cor all are accurate and deadly. Its design uses propellants efficiently. (Ret.) If you already have an AR chambered in 6.5 Grendel, the ONLY thing you need to change is the barrel. I also shot mine with an Ultra 9 direct-thread suppressor. They held a very consistent 34.58 grains of water. No surprise there since it is about the same weight as the 6 ARC and both used Proof Research barrels. It started as a popular wildcat before its approval by SAAMI. Dave Bahde Dr. WT? What explains that? From an LE perspective, changing calibers is like pulling teeth on a ticked off Grizzley, very low rate of success and its hard to beat a .223 for patrol. Consistency remained about the same with 2 or 3 out of five the norm. Should You Use the 6mm for Deer Hunting? - John In The Wild Short, relatively fat cartridges concentrate powder near the ignition flame for an even, consistent burn with a tendency to improve muzzle velocity consistency. Ultimate Reloader, LLC and Making With Metal can not be held liable for property or personal damage due to viewers/readers of this website performing activities, procedures, techniques, or practices described in whole or part on this website. The laser rangefinder, in part. If this development strikes you as the opposite of progress, you might have spent the bulk of your life in the 20th century. Both were termed Pointed Soft Point Core-Lokt bullets. Or it fits the extra-short AR-15 platform rifles beloved and preferred by many shooters. 1,226. Long-range started with a cold shot at 600 meters using the reticle followed by one at 1100 meters using confirmed elevation dialed in, holding for wind. Lets now realistically compare the 6mm ARC vs. five of its perceived competitors. Shooters needed cartridges that would fit these increasingly popular, super-short actions. 6mm ARC vs 6.5 Grendel. Five more for effect as fast as I could get back on target ended the drill. In the 1970s, the .222 Rem. A memorized trajectory curve combined with a ballistic reticle or turret dialing could compensate. Hornady 6mm ARC Losing Ground Hornady is claiming its 6mm ARC will yield 2,750 fps with a 108-grain ELD-M bullet from a 24-inch barrel. The current reincarnation of this round is the 6mm BR Norma, with essentially the same case dimensions. 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.

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