IIRC, the Lee Site has updated the listing about which primers are Okay to implement. They now seem to single out FEDERAL precisely: "Supplied ample penetration, a larger diameter bullet should have an edge in wounding efficiency. It is going to problems a blood vessel the smaller projectile barely misses. https://largerifleprimerswinchest91345.ezblogz.com/63584241/detailed-notes-on-federal-gold-medal-215m-primers