IIRC, the Lee Web page has up to date the list about which primers are Alright to use. They now appear to solitary out FEDERAL precisely: 223 Rem. They recommended CCI (more difficult primers) for all masses Employed in any firearm that has a totally free floating firing pin given https://andresehkkj.timeblog.net/67770517/facts-about-federal-benchrest-primers-revealed