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re: Official AR-15 thread

Posted on 4/30/14 at 12:03 pm to
Posted by LSUmakemewanna
Houston, TX
Member since Aug 2010
1733 posts
Posted on 4/30/14 at 12:03 pm to
quote:

And people who have have actually shot that gun with commercial .308 ammo have had problems.


Actually, people have had more problems with the NATO ammunition. Google.

quote:

They let them out the door all the time. Tolerance stacking is something no manufacturer can control 100%


I seriously doubt SIG is printing manuals that say 308 is fine to shoot while there being an issue with infact shooting 308 out of this rifle. C'mon man. This has little to do with tolerance stacking, and more to do with it being huge liability to tell the owner he can shoot something that is unsafe (i.e. the product manual). And it's been in print for a while now.

quote:

Do you even know where the brass is thicker? Do you know many commercial loadings are actually thicker in the case webbing and base?


The point that was trying to be made in that passage was more in recognizing the fact that there is not as much of a difference in the pressure between NATO 7.62 and commercial 308.

quote:

There is a reason why people who actually know about these things recommend getting a set of gauges or taking to a gunsmith to get checked out


Yeah, I get that. I have my builds (not factory) gauged. If it were me, since there seems to be controversy, I would not hesitate to get it checked. Then, go shoot it with 308.
Posted by Tiger2763
Member since Aug 2011
363 posts
Posted on 4/30/14 at 5:15 pm to
Looking for some Rock River Arms parts.

What's the best online dealer of uppers and other components for someone wanting to build?
Posted by Clames
Member since Oct 2010
16636 posts
Posted on 4/30/14 at 6:05 pm to
quote:

Actually, people have had more problems with the NATO ammunition. Google.


Wrong. Quality NATO ammo consistently measures to hold tighter specs than a lot of the low to mid-tier .308 commercial stuff and even better than a lot of the hunting .308 ammo. Start looking at who has feeding, and more importantly, extracting issues with the Sig 716 and you see it's mostly commercial .308

quote:

The point that was trying to be made in that passage was more in recognizing the fact that there is not as much of a difference in the pressure between NATO 7.62 and commercial 308.



Pressure isn't the issue as much at cartridge OAL and headspacing.

quote:

I seriously doubt SIG is printing manuals that say 308 is fine to shoot while there being an issue with infact shooting 308 out of this rifle.


I seriously doubt Sig had Barnes Vor-Tx ammo in mind when setting up that rifle. Barnes, like the vast majority of .308 hunting ammo, has OAL's all over the place. Maybe you missed the part where this guy wants to run the Sig for hunting?
This post was edited on 4/30/14 at 6:07 pm
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