Re: 50 BMG Primers
Much prefer the Blue Box flat head CCI 35's over the CCI Arsenal primers. Would definitely go with the Blue Box if they were still available. Talked to a tech at CCI and was told to use the flat punch and slightly flatten the head of the domed Arsenal primer when seating. Load data for each is the same. Had issues seating the Arsenal primer flush or below and primer pocket depth uniforming is definitely needed with the Arsenal primers and I still ran into a few that wouldn't seat flush or below. Don't believe the Arsenal primers are as consistent in cup height, may be wrong. I uniform pockets to .220" and have had no firing issues with the Arsenal primers in my M99.