A friend of mine just got a used .308 hunting rifle. He is debating whether or not to run surplus military ammo through it when he is out at the range. Of course he will use the expensive stuff when hes deer hunting, but the surplus military ammo is a fraction of the cost of new boxes from the store. Is military surplus ammo going to be less clean or affect his gun in any way? I had no idea so I knew the forum guys would have some good input.