Primers also have really small variances in diameter creating seating resistances noticeable - diameter dimensions fluctuate under .001 but even this small sum can be noticed on seating. My previous primer seating chore indicated that WLR primers took noticeably less effort to seat than CCI 200's. 1 Reply This is https://winchester-200-primers-in67901.amoblog.com/the-best-side-of-federal-large-magnum-primers-53816588