I usualy try to find PMC Bronze in 223, its cheap...er and i get good accuracy out of my AR from it and....its reloadable, or sellable. I hate using steel as it is hard on extactors and such, usualy its cheap and diry ammo. Recently they changed their 223 to PMC X-TAC i think but its the same stuff just diff name. I get it off of CheaperthanDIRT in mass quantity when i need a new case cause convenitenly i run of brass to safley realod all at once cause my AR gets a workout. I keep a new case of all the calibers on the shelf for the zombies tho...just in case.