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Doing a primer switch?

nitronova

Sergeant
Full Member
Minuteman
May 20, 2010
138
1
46
henderson nv
I'm switching from large cci primers to magnum 215. It's for a 300 win mag and I was wondering how far back I should back my load off when doing so? I'm running 208 with .010 jump and 76.8 of h1000. Should I just do a quick load development with them and start over? Thanks for your advice.