I have done some searching and have had lackluster results. I am looking for, for lack of a better adjective, the "best" all around defensive .223/5.56 round. I do not care about the price. This will not be my range ammo, but will be added to my stash for the looming apocalypse. . My research has led me to Speer's Gold Dot .223 round, but, I can't seem to find anyone that carries it. If it helps, my gun is a Colt LE6940. Thanks in advance my friends.