I was looking at a new Sig 716 while waiting for my roommate at Academy today and instantly fell in love with it. The one thing that I wasn't sure of those was the lower said "7.62 NATO". Would this be safe for .308 as well or would I have to stick with 7.62x51 only if I end up getting it at some point soon
I personally wouldn't but other people do so it just depends on you and your gun.
I'm gonna stop you right there, you just said an AR-15 is a high-powered rifle. It is obvious you don't know anything about guns and I shall ignore anything you say from this point on.
You will get some very rabid responses on both sides of this question. Personally, I believe the NATO stuff is preferred. Most .308 ammo in the 165 gr and lighter should be ok, SHOULD. Avoid the the "light magnum" superformance kind of stuff.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball