.308 Winchester loads in 7.62 NATO chamber. AR10 DPMS pattern.

[USMCM16A2]

[Sailormilan2]

Did you buy just a barrel, or, a complete gun? It may be marked 7.62, but cut to .308 specs. To know for sure, you need to check the headspace.
Generally speaking, you can fire commercial brass in a NATO chamber at least once. Though case stretch may be excessive. If you reload, then you'll need to back the die off so you don't set the shoulder back. Which would case excessive brass working. Of course, it you do that, you may not be able to use that ammo in another .308 which has a SAAMI cut chamber.

[tabascoz28]

I have been told, don't shoot 556 in a 223 barrel and don't shoot 308 in a 762 nato barrel. Do so at your own risk. The pressures are actually higher in a 308 and I'm guessing is maximized for hunting purposes.

If you make your own nato stuff then that's a different story. I only have 308 barrels and only work with nato brass in my semi stuff to cover my butt.

My bolt action rounds are near max but are clearly in a separate box using different projectiles.

[smoothy8500]

NATO spec brass, once fired full length resized, 45.5gr of CFE 223, 2805fps 168gr Hornady BTHP,

I follow Hornady’s guidelines for .308 Winchester

I don't think that is Hornady's Service Rifle data-That's a little hot in NATO cases. I'm assuming 308 AR and not M1A Scout Squad, correct?

Your 7.62 AR chamber probably will be a little more generous in diameter, and "may" have the shoulder datum that is .002-.004" longer. I have found most 7.62 marked AR barrels will pass the 308 NO-GO (not close) test. However, I have no experience with this Wilson barrel.

Regardless, when re-sizing 308/7.62 for semi-auto I always measure fired cases and bump the shoulder back .003" (I know F. Guffey will arrive any moment now to pontificate on "bump" and Headspace).

[ar15barrels]

What platform?
An AR type 308 sized bolt is strong enough to shoot 308.
An M14 bolt is strong enough but the action won't like the higher gas port pressure of 308 loads vs the lower gas port pressure of 7.62x51 loads.

[FLIGHT762]

My Remington custom shop 40XBKS barrel is marked "7.62NATO". It's no different than any other of my 308 win. bolt rifles. Fired cases come out @ 1.633"- 634".

Your Wilson barrel will probably be well within 308 Winchester headspace specs.

Is this barrel for a bolt gun?

[ar15barrels]

My Remington custom shop 40XBKS barrel is marked "7.62NATO".
Fired cases come out @ 1.633"- 634".

Sloppy chamber.
No need for it to be any longer than 1.632"...

[Featureless]

Question: Which came first the 7.62 or the .308?

[USMCM16A2]

Randall,


DPMS pattern, I only have standard .308 head space gauges. I called Wilson Arms today, but I didn’t hear back. A2




PS AR10 DPMS.

[pacrat]

Question: Which came first the 7.62 or the .308?

Win introduced the .308, 2 yrs prior to US using 7.62x51.

1952 v 1954

[smoothy8500]

I only have standard .308 head space gauges.

All along you had the gauges? You could have checked it out in the time it took to write the question ....

Regardless, the 308 AR will handle your reloads without any issues.

[USMCM16A2]

Ok guys, I used my .308 gauges to check the chamber. Go Gauge, perfect, closed 1.630 gauge length. No Go, wouldn’t close! 1.634 gauge length. NATO Go Gauge 1.6355, No GO is 1.638! It’s a .308 chamber. Maybe a hybrid chamber. A2

[hermosabeach]

brownells take

https://www.youtube.com/watch?v=cs9SqfOhvCM

[tabascoz28]

I was also going to say metallurgy. Think Ruger loads vs other guns?

[apes]

7.62 MG ammo

How does 7.62 MG ammo filter into this? I understand that the case length may be to 7.62 specs but is MG ammo loaded to higher than M14 7.62 specs due to the M60 etc actions?