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reloading 7mm mag 300 win mag

  1. The Ammo & Reloading Forum
    I screwed up and ran 47 rds of 7mm mag brass through a 300 win mag Fl sizing die. Is this brass ruined or will I be able to size it back down with a 7mm Fl sizing die or a neck sizing die? I have them all in the same blue plastic reload boxes, they use the same shell holder, and I just didn't...