OK. Thanks guys :). I will be shooting .308 165-168 grain ammo through it more than than the 7.62NATO. But I talked to a guy that runs a shooter supply and he said they put tougher bolts in the DPMS guns. And that nothing will happen with shooting any .308 ammo. But the 165-168 grains will be my best bet for hunting or other stuff. I shot an M1A at a gun range in Oklahoma City, and it was chambered in 7.62NATO, and we shot .308s through without any trouble. And this gun was used a lot of times, judging by the wear and tear on it. One last question. What type of Match Grade 7.62NATO should i get? For buying lots of it.