Home Forums Hunting & Shooting AR and Tactical Rifles Hornady 6mm ARC

Thanks.

I've managed to talk myself out of NEEDING a 6mmARC at least a dozen times already.... Curse you 'Fire!

I have an AR that is begging for a new barrel. In its current form it’s an honest 1.5 moa barrel. So thinking I will jump on the preorder from Brownells and get the 20 inch barrel. Oh and the Grendel bolt. Right now I’m waiting on parts for a 224 Valkyrie build..

John, keep us posted. I was just eyeballing the 20" barrel at brownells as well. I'll bet its going to be a shooter.

John,

A 1.5" AR is "begging for a new barrel?"

I remember when that was a rock star group for an average AR.

J's been shooting competitively now, for a little while, and must have caught the accuracy bug. Check out the black rifle challenge here, there are some of us here that believe ar's can be extremely accurate. A lot of us aren't talking 3 shot groups here either. J is one of those guys. Like me, when you shoot comp, you fire more than 3 shots on target, and you want them to be in the X-ring. If not, you might as well be golfing or fishing.. Here's how my iron sight AR did in the black rifle challenge here, and its better than 1.5":



It also scores an average of 100-8x. rost has said a few times that a good ar and good shooter can hold moa for 10 shots with irons.. He can correct me if I'm wrong, or I can find that exact quote from the challenge. When I heard that, I questioned it, but with the rifle I'm shooting, it's starting to prove his theory.. I'm like John, I believe with an optic, you should be well within 1 moa for 10 shots with a good AR. Not every AR, but with a GOOD ar... Here's how my Northtech Defense shoots pretty much all the time (well, it hovers around .8 MOA consistently):



As a side note: All of my AR15's have shot sub moa scores in the black rifle challenge here, except for my iron sight Noveske... Even with a scope, it just hovers around 1.1 moa...

lol you are right 3-4-6-8 yrs ago i wouldn’t of cared.. but after shooting matches last yr and x count along with 10’s. You need a AR that is an honest MOA rifle, my current setup with a green mtn barrel fits that bill great barrel. I used the PSA built AR with there barrel half the season last year and realized.

Realized PSA just wasn't cutting it, didn't you...

We all aren’t big money hustlas like you.. PSA is a good starting point it did what I needed it to do.. I might need to clean I have no
Idea the last time I cleaned it. But it’s very picky and it won’t shoot the bullets I need it to shoot 77 Sierra’s.. i thought about putting a 20 inch green mtn barrel.. But we have a 1000yd shoot coming up... none that 100 yd [bleep] you been doing lol 😜I’m just busting your nuts. But we have a 1000 yds nra high power shoot 60rds. If the stars align I will use this 224 Valkyrie. With 80 eld-m we will see..

Good luck buddy. Damn, you need an ar10 6.5cm for that 1000 yard match... are you going to be using your 1-4 scope? Id be fu cked, if i had to use a 4x at 1000!!!!

Hell no lol i will use a 10x.

Irons all the way!

Looks like 2700-2800 velocities are via 24" barrel.

18", probably in the 2500 fps range?


https://gununiversity.com/6mm-arc-review/

The claim is 2630 FPS for a 108 gr. from 18":


https://www.tactical-life.com/news/barrett-rec7-rifles-hornady-6mm-arc-dod-contract/

I'm thinking a 20" barrel might be about right...

Exactamundo

I finally jumped and ordered a CMMG complete upper with a 20” barrel. Looking forward to getting everything put together.

Should be pretty sweet. Buying a complete upper is going to save you a little time. I think if i were going to build one from scratch, id just go with Aero precision (upper and lower M4e1) and a Faxon 20" barrel from brownells ($216.00). Im thinking i could keep the cost below $800.00 for the complete rifle.

I’d like a 6 ARC upper myself.

Pretty much all of the Grendel-based 6mm wildcats (including the 6mm ARC) do that. Almost none of the 6.8 SPC-based or 5.56-based wildcats do. That's the entire reason the Grendel case is popular for these cartridges - to fit long heavy bullets at mag length.

In my 243 LBC barrels (one of the most successful Grendel-based 6mm wildcats) my accuracy loads for the 105gr BTHP and for the 95gr VLD which actually has a longer nose are both less than 2.260" OAL, even though 2.300" or slightly longer is possible with ASC mags. This is one of the few AR cartridges I've used where magazine length is not a restriction on potential accuracy due to jump to the lands.