The Hornady Match Grade Full Die is designed for reloaders to precisely size and seat bullets for precision shooting in the 6mm GT cartridge which is a popular competition round. Key features of the Hornady 046600 die: Caliber: Designed specifically for the 6mm GT cartridge. Type: It is a "Full Die" meaning it is a full-length sizing die not a set. Purpose: To allow reloaders to create match-grade ammunition with precise and consistent measurements for the 6mm GT cartridge. Series: Part of the Hornady "Match Grade" line of reloading dies