Sam3460: I am aware these are typically sale charges but I wonder just how high-priced primers and powder will come to be in the next... 223 Rem. They suggested CCI (harder primers) for all masses used in any firearm that has a cost-free floating firing pin since the AR does. https://winchester-large-rifle-pr08345.blogdal.com/32250978/5-simple-statements-about-federal-gold-medal-small-pistol-primers-explained