Magazines may be an issue and are undoubtedly the main issue you’ll hear with initial reviews. 'Øçà. Infographic by Hornady. ,§%±‰ˆQ"ş=¯ªggf7²0G$ly¦_õtÕ«�®n§ì’J¡¸ÀL‡!eWS4�™’¸jóÉeCâsG¾Ñ~8†ÊĞSNRZp ŠW�KjŞÅ� ³˜ßg‚ÃĞ° v‚-ïB¬€Í%_I’KQ A3e¬?i. 22415 C.O.L. Curious? The 6mm ARC was designed around optimal use with a 108-grain bullet. Here was my strategy to extrapolate my results to the likely scenario of the 24″ test barrel: Here’s the work-up: (pressure listed is MAX projected, not average). The cartridge makes use of 6 mm (.243) bullets, which are known for their high ballistic coefficients due to the high sectional density with less drag … IMR 8208 XBR - Mean Velocity 2756 FPS, ES 12, SD 5 Some pressure but definitely a workable load pressure wise 29 gr. 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. The Hornady 6mm ARC takes the 24-caliber into record territory — the slowest muzzle velocity of any commercial cartridge propelling.243” bullets. Would love to get this thing shooting consistently under .5 with enough speed to reliably ring steel at 1000. Let’s break down a few things about this number: So if you have a 24″ bolt-action 6mm ARC rifle, that’s the velocity you should expect. H4895. The SAAMI drawing states a muzzle velocity of 2,700 fps for 108-grain bullets. You’ll also note that when shooting the full kilo, 6mm ARC has more velocity than 7.62x51mm. • The 6mm ARC produces a larger splash signature that allows shooters to self-spot impacts and make rapid adjustments. Hey Gavin and fellow Ultimate Reloader Fans: I had a chance to do more testing today as I finally received some Hornady factory 105 grain Black ammunition. 6.5 Grendel • The 6mm ARC delivers comparable performance from a wider assortment of bullets, making it a more versatile choice. The 6mm ARC was designed around optimal use with a 108-grain bullet. The 6mm ARC is designed to run in existing in M4 rifle platforms. The 6mm ARC shows promise for competition, of course, but where does it fit in a field of already established 6mms? I shot out to 700 yards next with .4 to .5 MOA accuracy and ended the day putting 3 out of 3 shots on the 900 yard gong in a .4 MOA group. A 6.5 Creedmoor barrel typically lasts between 2,000 and 3,000 rounds, while the 6mm Creedmoor experiences serious velocity drops starting between 1,500 and … 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. Click here to view the cartridge and chamber print on the SAAMI website. San Tan’s innovative high-quality firearm systems and unparalleled performance in combination with Hornady’s New 6ARC round originally developed for a specialized group within the US DoD, and Proof Research premium carbon fiber barrels take the AR15 platform to a … Upon launch, Hornady will offer several factory loadings for the 6mm ARC, including a Hornady Black option designed for optimum performance in gas-operated rifles and loaded with a … What does all this mean? 243 caliber cartridges based on the.220 Russian case have been successfully used by competition shooters with the most popular of them probably being the 6mm PPC. 27.8 gr. 6mm ARC Velocity Data "Black" Download PDF. !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)? CMMG Endeavor 300 in 6mm ARC 2. 28.7 gr. Commercial 6mm ARC offerings will feature bullets selected to deliver ideal performance for hunting, match shooting and personal protection applications. 6mm ARC Velocity Graph Per Inch. The SAAMI drawing states a muzzle velocity of 2,700 fps for 108-grain bullets. FWIW I also doubt one would get there with my suggested 20" barrel either. What’s more: It’s already SAAMI approved! Your email address will not be published. Barrel-length is … 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. I chose to start with Varget because of what I read about 6mm PPC, and I have a lot on hand! SDs were in the low single digits, however! With the 110gr Sierra MK, velocity at 31″ was an impressive 3110 fps. San Tan Tactical®, Hornady Mfg®, and Proof Research® have partnered up on the San Tan new 6ARC rifles. Big fan of H4895 for heavy .223 but not super enthusiastic about it for 6mm ARC. After forming some cases I shot Berger 105 hybrid targets over 27.5 grs. VIHT N-133 26.1 gr. In my next story I’ll be deep-diving on the CMMG Endeavor 20″ 6mm ARC AR-15, and will be stretching its legs to greater distances. We chronographed that load at the range using a Labradar chrono out of the 21-inch and 18-inch ARs and got average velocities that were 2,680 and 2,616 which is directly in line with what Hornady is advertising. 6.5 Grendel • The 6mm ARC delivers comparable performance from a wider assortment of bullets, making it a more versatile choice. I purchased a 6mm ARC barrel from Brownels when they first came available. IMR 8208 XBR - Mean Velocity 2840 FPS, ES 5, SD 1 Pressure, more than I like to see - also a slightly compressed load Equally at home in AR-15 platforms and short or micro action bolt guns, this load is suitable for applications from personal defense to match shooting, hunting, and military and law enforcement. The 6 mm Advanced Rifle Cartridge (6×38mm), or 6mm ARC for short, is a 6mm (.243) caliber full-power rifle cartridge introduced by Hornady in 2020, as a low-recoil, high-accuracy long-range cartridge designed for the AR-15 platform.. I did not have time to work up a load for accuracy, so I’ll defer that discussion for a future post. I am waiting on a 10.5” barrel, but once I … 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! 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). I decided that since I didn’t have any load data, I would have to generate my own! Does the 6 mm arc not have 30 degrees shoulder angle?is wikipedia wrong? Save my name, email, and website in this browser for the next time I comment. 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 can’t. I also shot mine with an Ultra 9 direct-thread suppressor. A fun challenge. Not with the 6mm ARC. I therefore feel that Hornady’s claimed performance data is feasible. for 442 ft.-lbs. Above: 6mm ARC case capacity measured 33.96 grains H2O. 358 AR Chamber Velocity Test. I had a 20″ AR-15 to test with, so I had to do some math :). 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 6 mm Advanced Rifle Cartridge (6×38mm), or 6mm ARC for short, is a 6mm (.243) caliber full-power rifle cartridge introduced by Hornady in 2020, as a low-recoil, high-accuracy long-range cartridge designed for the AR-15 platform.. The Hornady 6mm ARC is capable out to and beyond 1,000 yards, and recoil between the two cartridges is similar. Always enjoy your videos. 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). I don’t know the velocity, but I suspect something under 3k. That is probably okay for this application. VELOCITY Hornady is advertising that their 6mm ARC with 108-grain ELD-M ammunition will go 2,750 fps out of a 24-inch barreled rifle. All told, the 6mm ARC’s case, proprietary (i.e., secretive) high-tech powders and 108-gr., 0.536-BC bullet results in a projectile still doing 1358 f.p.s. Poll: What handgun cartridge do you reload most often? The 6mm ARC is designed to run in existing in M4 rifle platforms. 350 Legend neck diameter. The old 243 Winchester can beat that by about 300 fps. Thank you for this timely video. The 6mm ARC achieves results never before delivered from the AR-15 platform with the ultimate blend of system weight, performance and shootability. Ultimate Reloader LLC is not responsible for errors in load data on this website. I am waiting on a 10.5” barrel, but once I … I was lazy, and using known data from the 6mm AR, I loaded 27.5 grains of H4895 under a 105 Berger Hybrid Target. Today's testing using an 6mm ARC upper I built up with a 16" barrel (4 groove cut rifled barrel 1:7.5" twist) with a SAAMI 6mm ARC chamber: 26 gr of H4895, CCI BR4 primer, Berger 105 gr BT, Lapua reformed and trimmed 6.5 Grendel brass, 2.265" OAL magazine fed = 2453 fps - .505" 5 shot group - accuracy excellent. While 6.5 Grendel AR magazines could ostensibly be used, we received a pair of dedicated 6mm ARC Israeli E-Lander magazines. .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. As a follow-up exercise, I plan to use QuickDesign software to create a more accurate model for the 6mm ARC. Do not attempt any of the processes or procedures shown or described on this website. I like to stick with as temp stable powder as I can, so I give up a little velocity. H4895 with 5-shot groups from the high .5s to 1.0 MOA. I like benchmark, but had good results with 8208xbr too. Poll: What Progressive Reloading Press Do You Use Most? I tried the hand loaded 27 grain Varget loads and they shot a pleasantly surprising .5 and .52 MOA group at 100 yards. H‰ìWMoE½Ï¯(qÚ9l»»ú³¸"Pœ(ò I to have a precision .224 V and would love to see a real world side be side comparison with the 6 ARC. Case: Hornady 6mm ARC (new and 1x fired tested) Powder: 27.0 grains Hodgdon Varget. I had only some pre-primed new Hornady 6mm ARC brass to start with and the SAAMI Specs for 6mm ARC. This was way over pressure yielding speeds in the 2730 FPS range, heavy ejector swipes and unusably expanded primer pockets. Standard practice is to start tweaking burn rates, bullet weight and weighting factor to “make” calculated muzzle velocity match actual. See full disclaimer below. This was way over pressure yielding speeds in the 2730 FPS range, heavy ejector swipes and unusably expanded primer pockets. This morning, using the same scale and method as Gavin, I measured the case capacity using water weight in two sets of fired but not resized cases. Poll: What’s your number one reason for reloading? 6mm ARC introduction pdf The case looks like the shoulder has been moved back, and the neck is a little shorter as compared to a Grendel case. 350 Legend Neck Diameter (pdf) Download. 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 factory 105s shot at 2662 FPS with an SD of 11 as measured by a Labrador. They held a very consistent 34.58 grains of water. And that’s the subject of this article: chronicling my first loads (I did not have factory ammunition to test) and validating claims related to 6mm ARC performance. Both in velocity and trajectory outperforms 7.62 NATO. 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. 6.5 Grendel vs. 6mm ARC Ballistics As you can see, velocities differ by 170 – 220 fps, with the lighter 6mm ARC … I also measured five fired but not resized factory 6mm ARC cases. 6mm ARC Velocity Data "Match" Download PDF. 29.1 gr. CFE223 gives great velocity results but generally with double digit SDs. Groups were all in the 1 to 1.5 MOA range at 100 yards. Quickload can be frustrating when there is more than 10 FPS difference between calculated and measured MV. Advertised velocity of the 6mm ARC 108-grain ELD-Match load is 2,750 fps from a 24-inch barrel. I’ll be publishing a full overview story covering this rifle, but in the meantime, here are some specs from the CMMG Product Page: CMMG’s ENDEAVOR line of rifles are now available in Hornady’s new 6mm ARC (Advanced Rifle Cartridge). Also, I don’t know how fast the 6mm ARC builds velocity, so the velocities could be closer between the two cartridges in shorter barrels. Again using QuickLoad, I developed the following load: Here I saw velocities averaging 2,631 FPS. I have a precision set up AR in 224 Valkyrie. Those held a water weight of 34.74 grains with a SD of .14 grains. 31 gr. What’s the plus delta on each? WARNING: The load development techniques and load data shown in this video are experimental and are for DEMONSTRATION PURPOSES ONLY. There’s a way to things, generally speaking, even in the ammo world. : 0.280 VELOCITY (FPS – feet per second) POWDER 2800 2900 3000 3050 3100 3150 3200 Accurate LT-32 25.5 gr. Do not attempt to repair or modify any firearms based on information on this website. The 6mm ARC will be offered this year in 105-grain BTHP BLACK, 108-grain ELD Match, and 103-grain ELD-X Precision Hunter loads by Hornady. Pretty cool having a light-weight AR-15 that can accurately shoot out to at least 900 yards. I'm getting about 2850 with the 90s and 3300 with the 58s. This slows extraction and makes it much less violent, prolonging the bolt’s life. After consulting Quickload, I also shamelessly lifted Gavin’s 27 grain VARGET load under 108 ELD-Ms. My Ballistic Advantage barrel is a little different than Gavin’s. I am a much better bolt gun shooter than AR shooter. The first groups were the 6.5 Grendel cases that I modified for the 6mm ARC. For this load, I shot a group of 3 shots on the chronograph, and observed the following: (better chrono data coming in future stories, I had limited components and time). 6mm ARC: Fact or Fiction? 350 legend velocity Testing data. Download PDF. Poll: What Reloading Components Can’t You Find? Always cross-reference load data with manufacturer's published data. Designed to meet the needs of the world’s toughest critics, the 6mm ARC utilizes efficient, high-BC bullets to deliver unprecedented performance from the AR-15 platform. While it is the same length of 20″, my twist is faster at 7 rather than Gavin’s 7.5. Hornady 6mm ARC brass looks to be of good quality, is fairly consistent and should give you a number of reloads as long as don’t lose them, or are pushing for maximum velocity. Read on! 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. 6mm ARC is so new that as of the writing of this article, published load data did not exist! I'm getting about 2850 with the 90s and 3300 with the 58s. 26.9 gr. 2730 FPS and way over-pressured though SDs were single digits, groups were all just over 1.25 MOA. Use load data at your own risk. Hornady is launching the 6mm ARC with three loads running in weight from 103 to 108 grains at about between 2,750 and 2,800 fps from a 24-inch barrel. I’m interested in a direct comparison to the 224 Valkyrie and the 6 mm ARC. Primer: CCI BR-4 (for 1x reloads) COL: 2.260″. This rifle is optimal for 6mm ARC because of the 20″ barrel length, and the 1:7.5″ twist rate. It gives a little more velocity than Varget but with a corresponding pressure increase. H-4895 is closer to the “6.5 Grendel” sweet spot, so I thought it would be worth a try. 26.4 gr. Contact ultimate reloader by clicking here. It’s a 6mm cartridge similar to 6.5 Grendel, built for the AR-15 platform, It’s optimized for bullets in the 103 grain – 110 grain range, It’s got more velocity and less recoil compared to 6.5 Grendel, It shares the same parent case with 6.5 Grendel: The 220 Russian, It’s 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 that’s 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), It’s 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 Hornady’s factory ammunition with the 108 grain ELD-M bullet. Based on my best estimation, my H-4896 108 ELD-M load would produce approximately 2,754 FPS in a 24″ bolt-action rifle. 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 Quickload’s estimated 2552 FPS. There’s more coming related to 6mm ARC! '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'); © 2021 Copyright 2016 Ultimate Reloader LLC. Poll: What Rifle Cartridge Do You Reload Most Often? The content on this website (including videos, articles, ammunition reloading data, technical articles, gunsmithing and other information) is for demonstration purposes only. 27.8 gr. First firing: I was lazy, and using known data from the 6mm AR, I loaded 27.5 grains of H4895 under a 105 Berger Hybrid Target. Groups were all in the 1 to 1.5 MOA range at 100 yards. 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. SAAMI New Cartridge, Chamber, & Test Barrel 6MM ADVANCED RIFLE CARTRIDGE Maximum Average Pressure (MAP)* = 52,000 psi Instrumental Velocity**: 108-gr @ 2,700 fps Crusher pressure limits not established. 27.3 gr. This is a much more confidence inspiring correlation with regards to safety and predictability. My barrel is a 7 twist 20” and I’m going to try the Hornady 108s and I may try some VARGET too as it is another of my favorites. Lè_ ø°ÃÚ
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I like to stick with as temp stable powder as I can, so I give up a little velocity. June 18, 2020 Gavin Reloading Blog 224 Valkyrie, 300 PRC, 6 ARC, 6.5 Creedmoor, 6.5 PRC, 6mm ARC, 6mm ARC Load DAta, 6mm Creedmoor, CMMG AR-15, CMMG Endeavor, CMMG Resolute, Hornady, Long Range AR-15, New Rifle Cartridge, Precision AR-15, QuickDesign Software, QuickLoad Software, Reloading, Reloading 6mm ARC, Reloading Blog, Reloading Press, Reloading Videos, Shooting 6mm ARC, Ultimate Reloader.