American made .30 carbine ammunition is the best in the world.
Stick to Federal, Cor-Bon, Hornady, Winchester, and Remington
for use in your USGI carbine. Some foreign stuff is great. Some
foreign stuff is for practice only. A lot of foreign stuff is just plain
junk. No foreign stuff is anywhere near as good as U.S. commercial
ammunition. Buy American. If your carbine is used for law enforcement
or a personal/home defense situation - never use foreign, hand-loaded,
or re-loaded ammunition. There are NO EXCEPTIONS to this rule: use
factory loaded cartridges only.