The Lyman MSR Precision Die System 9mm Luger 4-Die Set is expertly designed for those who demand precision when reloading for modern sporting rifles. This set includes a Small Base Size die to ensure smooth chambering and a separate Taper Crimp die for secure bullet grip. Additionally each set comes with an Ammo Checker cartridge Go gauge for added accuracy. Safely housed in a durable clear cover storage case this die system is essential for any serious reloader.