I did a search of the Ammo Can, and it seems there is plenty of discussion on home/self defense hand-gun ammo, but still haven't gotten to something that addresses what people stock up on for their defense ammo for their AR platform rifles. Currently, I'm stocking up on practice ammo, whatever cheap I can find.... but will need to look for something if I need to use the AR for its intended purpose. Have heard that I should load up with the green tip "penetrator" ammo, (forget the #)... but then there are also hollow points. Twist is 1:8 in my rifle and so I think that should cover all except the heaviest loads. Your thoughts guys? And, yes, I will continue to refine my searches, while I wait to hear what you guys have for thoughts. Thanks as always!!