Charlie98,
I've probably got around 2k of those same primers, maybe 3, and like you, I had them blow out on 41 loads but in new Starline brass. The loads were the same loads I had been shooting for 20+ years and not top end at all. It had .e completely messed up.
I might load up a few and see if they will run with my 185gr SWC loads which only use 4.2gr of Bullseye.