Okay...I'm not really going to ask this question because I KNOW it has been covered somewhere else on this forum, I just can't find it. Someone please direct me to it if you can.. My question is, which grain .223/5.56 should I be shooting if my use is for 100 yard range fun and home defense? Thanks.. So far my only understanding about ammo is that heavier grains are more ideal for longer range shooting... Maybe I'm wrong. Even if I'm right, I'm sure there's more to it than that..