I am looking at buying some bulk 308 ammo, and I have come across some good deals on Lake City, PMC, and American International. I prefer to avoid really dirty ammo unless the price is just too good to pass up. Have any of you used any of these three ammos (PMC, Lake City, Amer. Int. or some other brand worth looking into), and what are your suggestions? P.S. Let me add Prvi partizan to that list. Thanks in advance.