The Ginex primers might be up to four or 5 ten-thousandths larger in comparison to the Feds and your micro would hardly ever know the real difference. A wee bit off topic, but greatly connected, I discovered Fed SPM’s at Brownells this morning for $89 + haz and (affordable) shipping. https://collinsropi.canariblogs.com/what-does-federal-gold-medal-small-pistol-primers-mean-46980015