IIRC, the Lee Web site has up to date the checklist about which primers are ok to work with. They now appear to single out FEDERAL especially: The primers and powders you might be seeing at the moment have already been inside the process for about a year Virtually all https://215-federal-primers-for-s25678.theobloggers.com/38020416/top-guidelines-of-federal-large-rifle-magnum-match-primers