look up jiujitsu2000 on jewtube for reloading 223 and he has a pretty good video. 55 grain is what you want, it's the best projectile for the caliber overall. All professional roo shooters in Australia use it. I laugh when people say 223 isn't enough, i guarantee if you shoot someone in the head within 300m with a 55 grain... their head is going to look like minced meat. It is the absolute perfect round, especially if you need to carry lots of ammo through various terrain... which is exactly what guerrilla warfare is. It's perfect.