It could have been operator error, but the gun didn’t recoil that much. 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. Our test rifle, a Barrett Rec-7 with an 18″ carbon-fiber Proof Research barrel, was shot out to 1,250 yards for testing. Need more reliable/quality options still!!! They are a manufacturer that is willing to standardize a particular performance concept and take a cartridge to market and make it “mainstream” with SAAMI specs. The easiest example for me here is the 6.5 Creedmoor – an incredibly popular cartridge and the clear winner in terms of adoption of other similar calibers. Bolt Carrier Groups; Gas System Parts; Lower Receiver Parts . by Ryan Cleckner Jun 3, 2020 95 comments 4.7 (133). This table really shows the difference between the 6.5 Grendel and the 6mm ARC. 1. Looking like a very interesting new caliber to choose from. They worked, but there could be improvements because the 6mm ARC is slightly different than the 6.5 Grendel. Submit Review. I do love the Grendel. the answer to the: “not available to the public bullet” long range round. I’ve ordered a 6mmARC barrel from Brownells to rebarrel my .244 Valkyrie. This 6 ARC and the 300 PRC. Bad move Hornady. DoD doesn’t simply pay the sort of price for ammo that they wanted. However, if you’d like to keep the same rifle platform while gaining an increase in energy and long range performance without much more recoil, then the 6mm ARC is for you. It’s tough to pick a “winner” here without knowing your situation. BARREL 22 in., 1:7.5-in. Hornady’s new 6mm ARC handily beats the 223 Rem/5.56 NATO in all but two areas: magazine capacity and availability. LOL, but the “updated grendel” as you put it is 10+ year old data. Variations on a theme. The 6.5G with the 100gr ELD-M is effective on hogs yet shoots flat enough to reach out over 200yds for coyotes. Excellent read. UINTAH PRECISION UP-15 TYPE Bolt action CARTRIDGE 6mm ARC (tested) CAPACITY 5 rds. Go figure…. I don’t think Hornady could have named it the 6mm Grendel because of likely trademark problems with Alexander Arms. The final product for the DoD customer that we tested was a cooperation from a few industry members: Barrett, Hornady, Nightforce, Geissele, OSS Suppressors, and Proof Research. 2) I use E-Lander magazines for the 6.5G exclusively. These are readily available and of known quality. Maybe with Barrett involved, they can come up with a decent magazine. I was planning on building a 6.5 grendel. This is a great read as all you have put out have been. I should probably worry more about such things but the way I look at it, I worry about barrel life as much as I worry about tire life when talking about a vehicle performance upgrade. I am very familiar with Huntsville – We used to live there (we loved it) and for the last few years I’ve taught Constitutional law courses at UAH. Sorry, but if you think the difference between 260 Rem and 6.5CM is equivalent to “rounding differences”, then you don’t grasp the important design improvements made to CM to propel its capabilities well above 260 in long-range use. Instead, they took the torch, standardized (and modernized) the dimensions, and brought it to market with accessories and load data that allowed it to be easily adopted by the industry. In Alabama! issued: 01/20/2020 6mm a dvanced rifle cartridge [6 mm arc] revised: 06/12/2020 do not scale from drawing.945 - .010 (24.00 - 0.25) transducer location 24.000 ± .010 (609.60 ± 0.25) '.4325 (10.986).200 b .800 (20.32) b (5.08) 1.1200 (28.447) 1.1901 +.0005 (30.229 + 0.013).237 (6.02).243 (6.17) bore dia. The 12-18 inch ballistic numbers will be important. It’s business as usual between lawyers and everyone needing to put their own name on the same cartridge, otherwise Whitley would have called the 6mm AR a 6mm Grendel from the beginning and Hornady would have just made ammo/brass/dies for it. STT Enhanced Bolt Carrier Group - AR-15 6mm ARC Specifically designed for the 6mm ARC (Advanced Rifle Cartridge) Hornady Cartridge. Black Nitride Finish. San Tan Tactical believes in America, and the heritage upon … Once you’ve got a barrel chambered in 6mm ARC, a bolt is all you need to complete your conversion of your AR from its current caliber to 6 ARC. Using the info you posted, in JBM I got an estimated MV of 2,560 FPS with the majority of the numbers overlapping. 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. So, here’s what we’re going to try to do: make an apples to apples comparison when possible. If you don’t understand the different reasons behind competing choices, you aren’t qualified to put forth an opinion…in my opinion haha. Your email address will not be published. How does the 6mm ARC line up against the .243 win? and Hornady 123 gr A-Max 6.5 Grendel (no BTHP by Hornady is available for comparison). Unfortunately, the .224 Valkyrie doesn’t preform well with MOA! Robert Whitley came up with this cartridge a decade and a half ago. The easiest way to explain the origin of the 6 ARC, or what the 6mm ARC is, is to call it a modernized version of the 6.5 Grendel but with a 6mm bullet. For example, at 1000 yards, the 6mm ARC needs 10 mils (33.75 Moa) of elevation. Personally, in contrast to the semantics of it. I don’t follow the logic. Also, they didn’t work great. The 6mm ARC on the other hand … 6MM ARC Enhanced Bolt Carrier Group; 6MM ARC Enhanced Bolt Carrier Group $ 199.00. One in particular comes to mind which showed an unacceptable amount of vertical stringing. To me, a jump from 10 Mils to 15 Mils is VERY significant. Point of interest would be the reason of the slightly shorter shoulder on the ARC, I need to load the Bergers single shot as they are too long for magazine loading at .030 jump. Nice article, very informative, thanks. I’ve had a lower sitting here for awhile. are at the point of diminishing returns. To be honest, I’m kind of surprised Hornady did not even mention the 6mmAR which has been used for a LONG time successfully. Those of you that know the nuances of wildcat cartridges (cartridges that are not regularly commercially available and instead mostly common with hand-loaders who tailor their own rounds) already know that 6mm versions of 6.5 Grendel-like cartridges already exist. Silver $$ Contributor. 3) to be clear, many of the current 6.5G bolts and barrels are sold as Type II for a 0.136″ bolt face depth. CHECK PRICE. Thanks for the informative article, did you see any photos of rounds shot into ballistic gel or other actual performance vs different mediums? But, since they each share the 220 Russian as their parent, maybe they’re siblings? I’m referring to being on target and shooting an actual group at each distance). Seems they could have reached the performance objective with a smaller higher pressure cartridge. Thank you for adding this. Tikka T1X Review [2020]: Top Notch 22LR Rimfire Rifle, FFL eZ CHECK – What it Is / How it Works [2021], Shipping Firearms Guide [2021] How to Ship a Gun. Here’s my situation: I like long range shooting and I don’t have a 6.5 Grendel already so I’m going to be getting myself a 6mm ARC. Thanks, great article and I’m excited to get it built. For an ordinary AR-15 chambered for the .223 Rem/5.56mm NATO, a new barrel, magazine and bolt are required to convert to the 6mm ARC. They turned out to be junk! However, for long range, the 6mm ARC is a big enough difference for me. Most of the shooting was conducted standing off of a tripod from 300-615 yards on steel targets. or 10 rds. Both the Hornady 105 gr BTHP and 108 gr ELD-Match data is included: And now, let’s compare the new 6 mm ARC to some other calibers. Sale. Their 6.8 mag is first rate, just a bit short for handloaders. 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. Be the first to rate this post. . Some models of Brownells exclusive AR-15 barrels chambered in 6mm ARC are in stock and shipping now. I’d love to see how this fares from different barrel lengths. The 6mm ARC, however, is not simply a “necked-down” 6.5 Grendel because the shoulder is also back a bit on the 6mm ARC. It is listed in Wikipedia. The 6mm ARC can also be a suitable chambering for shorter "mini-action" bolt action rifles. Nice to see other Huntsvillians on here. I am wondering if a CMMG Mutant Mk47 style lower with constant curve AK pattern magazines and 308 Winchester bolt face would be a step up in a high round count military environment? If I’m understanding you correctly, that’s like saying a Ford pickup doesn’t run well on liters of gasoline. Very informative! Compared to .308 Winchester/7.62×51mm NATO, the 6mm ARC has less recoil, better long-range performance in most cases in the form of less wind drift, better penetration in most cases and lighter ammunition. Just want to say none of my 6.8 mags have ever given me any sort of trouble. The 6mm was an 18″ barrel. e.g. I love your work. Which is the reason why I couldn’t commit to 6.8SPC (other than the LWRC), 6.5 Grendel, or 7.62×39 in the AR platform. After all, they did this with the 6.5 Creedmoor – the .260 Remington already existed for many years (as did some other similar options). The bolt itself is fabricated from 9310, while the carrier is built using 8620 hardened … Also, there are many more 223 specific parts for AR-15s. The 6mm ARC by Hornady clearly hits harder. There’s a LOT to be said for more efficient case designs, bullets, and standardizing myriad wildcats. At 400 yards, the wikipedia stats show 31.1 inches of drop for the land you reference at 400 yards. The Brownells 6.5 Grendel / 6mm ARC Bolt Carrier Group provides users with a caliber-specific bolt carrier assembly that ensures reliable, premium performance at an affordable price. Meh, AA mags ARE E-landers. If you’ve already got an AR-15, you can convert it to a 6 ARC by replacing the barrel, changing the bolt, and using a dedicated magazine. Clearly, 223 Rem is WAY more available and less expensive. Appreciate the comparisons. There are ten and twenty round small capacity AK magazines of different calibers now that allow a better prone position than with a standard thirty round length. I like diversity and welcome the 6mm ARC. Ahha! 6mm ARC follows the current Hornady marketing lingo and at the very least is a some what informative name for the cartridge.
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