Carbide Die Sets consist of a Carbide Sizer Die with Decapping Unit, Expander Die for expanding and belling the case mouth, plus a Seater Die with Roll or Taper Crimp and Bullet Seater Plug. RCBS has over 60 years of precision die making under their belt. And the industry’s most experienced die craftsmen working under their roof. These craftsmen, following rigid RCBS specifications developed over many years, produce more reloading dies in more calibers (over 3,300!) than any other reloading die manufacturer. RCBS Precisioneered Reloading Dies are for shooters who demand reloads equal to the quality of their guns. Each RCBS Die is made from case hardened steel. The inside surfaces of all RCBS Precisioneered Dies are precision-drilled and reamed to the same exacting standards as the finest gun mechanisms. Full-Length Sizer Dies for bottleneck cases have vents to prevent case damage caused by trapped air and for excessive lubricant. Headspace is held to minimum tolerances to avoid changing the case body length during full length sizing. Each RCBS Die is properly hardened and hand polished. This special RCBS finishing produces a die that will withstand years and years of the abrasive type of wear caused by case sizing. All RCBS Seater Dies have a built-in roll or taper crimper as appropriate for the particular caliber. To seat bullets without crimping, simply unscrew the die until the crimp ring no longer engages the case mouth. Large, easy-to-adjust hex lock rings utilize hex head setscrews. Unless otherwise noted, all RCBS Precisioneered Dies have the standard 7/8”-14 thread. Dies are packaged in stackable, plastic storage boxes specially designed to protect the dies in shipping. Includes loading data label.