White Oak Armament's thoughts on 6mm ARC

[ormandj]

I carried the M2 Carbine in the M1A configuration as my secondary for 3 inserts and then a Car 15. I've carried the M16 and M14 as well.

All my own opinion!

As the range closes the 7.62 x 51 is detrimental to accurate follow up, as the range exceeds 500 yards it shows that it's long in the tooth. The heavy 6 mm and 6.5 mm projectiles while not a modern concept their respective efficiencies in there current configurations are modern.

With a 5 1/2 lb rifle 110 grain projectiles slows accurate follow up so while I love the M1 and M2 30 Carbine for close work (200 yards-) it's best when modernized with a new stock to weigh about 8 lbs.

The Car 15 of my day evolved into the M4 and for close up and personal work to 300 yards it's efficient, at 400+ yards it's dicey and as the wind kicks up it's a more of keep their head down proposition at that range.

At 52,000 PSI the 6MM ARC is the same pressure as the original 5.56 x 45, which gives me hope for durability. It remains to be seen if 1 base cartridge with a108 grain projectile can work in an M4 at 14 1/2", the M16 at 20" and a specialty rifle with a 20" or a 24" tube. The logistics people love that.

Ballistics are great for the 20" & 24" barrels I question the performance in 14 1/2" barrels and the sustained fire tests need to be perfect. Since a man's ass is on the line I'd like to see an M4 and M16 in 6MM ARC run uncleaned for 5,000 rounds and see what gives.

Re: 14.5" barrel and velocity: https://content.osgnetworks.tv/firearmsnews/content/photos/Hornady-6mmARC-8-770.jpg

You can go plug it into Hornady 4DOF, it's quite good at the distance it'd be used out of a 14.5" barrel. I was originally building an 18" but am considering a 16" now that I did the 4DOF crunching out to 1000. I'll probably build a 11.5" SBR, too.

 

[243Mendoza]

From what I read it's similar to 243 Winchester ballistics out of an AR 15 platform with a 24" barrel. That's good for varminting and medium game. It's not 6MM Remington performance but it's not 65,000 PSI either.

WOW! You will be shedding lugs faster than a Lab shedding hair in summer!

 

[243Mendoza]

This is nothing more than another fatrat or turbo. Virtually no difference. I own both.

No. The 6ARC is closer to the 6AR with even slightly less powder capacity...check the chamber specs for each.

 

[Clancy]

Thanks, I've been hand loading over 50 years and have never had the pleasure of prying brass off a bolt face. I stick to the if it won't open with a pinky finger back off method of load testing. However I am patient and may take 2 years to work loads.

I keep wondering.... do you mean the gun will sit around for two years, or it takes you that long to settle on a load?

 

[Old Navy]

Looks like Aero Precision and Brownnell's think the ARC has a future.
100-040-983WB
AR-15 6mm ARC Complete Upper 24in SS Barrel
Mfr Part: APAR500705M80BC



$799.99

 

[Mr Underbridge]

Hornady sure are exited about straighting out the taper of a 6 PPC

 

[David Milisock]

WOW! You will be shedding lugs faster than a Lab shedding hair in summer!

I'll never break a lug, the 243 comparison is just for factory ammo shooters not to beef up the 6mm arc. Factory 100+ grain 243 is only about 150 to 200 faster then the 108 6MM ARC.

 

[David Milisock]

I keep wondering.... do you mean the gun will sit around for two years, or it takes you that long to settle on a load?

No I'll try a powder with several loads, then maybe in 2 weeks a few more , then a few weeks later or a month later more. I went through 3 or 4 different powders with my 6MM Remington, about the same maybe more with my 358 Norma Magnum. My 223 was a real pain as I simply could not find a load for the 1 in 12 twist and 55 grain bullet that was worthy of 300 head shots on chucks in the wind. Finally I settled on 40 grain bulletts with high speed. I used Malaysian military brass to get more powder in the case. The reduced time of flight reduced the groups considerably under wind. The 55 grain would group about 1 1/4" at 300 yards on calm days but the wind would spread them out enough to miss a chucks head. The 40 grain shoots 1 1/8" on calm days but manages to stay within 2" in the wind.

 

[LGKLAS]

Hi all, I've only read the first page of comments on this topic. So excuse me if what I am going to say has been cussed, er discussed. I don't want to start any $*#).

I am interested in this cartridge because I own an AR. But, I think we might be off on the wrong track. Because I first read about this cartridge in an article explaining the reason for its development in Military Times. It seems SOCOM wanted a cartridge that had a heavier bullet weight and longer range accuracy that could be fired from its 5.56 AR platforms and those current bullet weights. Hence Hornady came up with the 6mm ARC. A cartridge to fill the accuracy void between the 5.56 and 7.62. in a platform they now use and can enjoy parts interchangeability. & with a decent mag capacity. I think it is 25, verses 30 & 20 respectively.

From what I have read here, we seem to be thinking Hornady developed it for us AR-15 shooters and possibly not with the idea of us would loading to max charge weights and beyond . Not the case, pun intended. Rather developed for the military and then offered to us. So, if we keep the loading (pressure) parameters in mind we won't have the issues White Oak mentions in their blogpost.

I am keen on the idea of getting or building an upper and putting it along with a Milrad scope onto my Colt lower when I want to shoot my AR-15 at further distances than I currently (plink at max 600 with an ACOG) do. Santan Tactical is selling a whole rifle but at a premium price. Rather go the upper route. Aero-P & Brownells, though still spendy.

Anyway , will look forward to reading thru the whole thread. And seeing what comes to market for us. Another article I read mentioned something about feeding problems with the magazine. Hope I did not start a $^%# storm.

 

[dolek]

Wrong track ? The first post was negative, did you really expect a different track ? Baiting in the Hornady haters ?

 

[Dusty Stevens]

Parent case is a 220 Russian. Lapua is readily available... and make Sako?

I dont think you can stretch a 220r out that long- could be wrong. The only thing they share is a boltface, along with both their granddad the 7.62x39

 

[LVLAaron]

Wrong track ? The first post was negative, did you really expect a different track ? Baiting in the Hornady haters ?

LGKLAS did a pretty good job of summarizing. I didn't start the thread to be negative or bait anyone. I would love a commercially available barrel/cartridge in 6mm. It's nearly impossible to get a 6mmAR(turbo).

 

[riflewoman]

And adopted by the military.

It ain’t adopted until Lake City starts making it.

 

[243Mendoza]

LGKLAS did a pretty good job of summarizing. I didn't start the thread to be negative or bait anyone. I would love a commercially available barrel/cartridge in 6mm. It's nearly impossible to get a 6mmAR(turbo).

The 6ARC is not a 6AR Turbo; it is more like a 6mmAR or the little brother of the Turbo :}

 

[LVLAaron]

Right. I'm just saying, both 6AR and 6AR Turbo are difficult to get. 6 arc isn't.

 

[David Milisock]

I see the AR platform much like the old 03 and 03A3 right after the war, military style, inexpensive, safe, reliable and the small arm of the day.

A 6MM ARC version is a inexpensive way for a family man to have factory ammo, mid level 6mm performance for defence, varmints and medium game. A family man can startv9utvwith one upper and transition to a second, let's face it a 16" is plenty for 200 yard + white tail and a longer tube for varminting or as a stalking rifle.

 

[RustyPin]

I see the AR platform much like the old 03 and 03A3 right after the war, military style, inexpensive, safe, reliable and the small arm of the day.

A 6MM ARC version is a inexpensive way for a family man to have factory ammo, mid level 6mm performance for defence, varmints and medium game. A family man can startv9utvwith one upper and transition to a second, let's face it a 16" is plenty for 200 yard + white tail and a longer tube for varminting or as a stalking rifle.

Good Post, though I'd opt for the 6.5 Grendel or 350 Legend for 200 Yards, & Grendel is available now.

 

[243Mendoza]

Right. I'm just saying, both 6AR and 6AR Turbo are difficult to get. 6 arc isn't.

I should have asked "why is the 6AR difficult to get"?

 

[LVLAaron]

I should have asked "why is the 6AR difficult to get"?

Where can I get a 6mm AR Turbo 20" barrel only?

 

[Hohn]

And adopted by the military.

"Adopted"?

Tire kicking isn't *quite* adopted. When lake city is pumping out 100k a month, then it will be "adopted" enough to matter.