The Ginex primers may be up to 4 or 5 10-thousandths larger than the Feds plus your micro would under no circumstances know the real difference. A wee bit off subject matter, but very much related, I discovered Fed SPM’s at Brownells this morning for $89 + haz and (realistic) https://federalprimersfor9mm68901.ltfblog.com/30991691/the-2-minute-rule-for-federal-large-rifle-magnum-primers-215