IIRC, the Lee website has up to date the listing about which primers are ok to employ. They now seem to one out FEDERAL particularly: Extended a long time ago I went to the use of CCI primers on the magnum range. The only real exception is CCI bench rest https://deanfuhrb.myparisblog.com/32357145/indicators-on-federal-215-large-magnum-primers-you-should-know