The .50 BMG Die Set contains Size and Seat die needed to load the huge .50 BMG cartridge. The .50 BMG die set used with the AmmoMaster 50 Press makes loading this cartridge a simple task. The Size die resizes the entire cartridge case, while the Seat die facilitates the seating of the bullet. Both dies are made from high-quality materials and are designed to work seamlessly with the AmmoMaster 50 Press. Using this die set, you can achieve consistent and accurate reloading of the .50 BMG cartridge. This is especially important for long-range shooting, where accuracy is critical. 2 Die Set with Full Length Sizer and Seater Die Massive 1-1/2" design Designed for use with AmmoMaster 2 Hardened steel dies for years of use All RCBS dies are machined to exacting tolerances, hardened and finished to the highest standards in the industry Made in USA