300 rum donor brass

  1. Mazdayasna

    Wildcatting Fun & soft Norma Brass

    Forming 300 RUM brass down to a lower or shorter Cartridge: For this Example the Wildcat is called the "7mm Win Mag". With a Case is 2.5" long. 1st Trim the Brass to Length. I use a derelict .375 RUM FL Die and Move the shoulder for forming. It's important to establish the shoulder location on...
Top