Super Simplex Die Set for 250 Savage (4025030)The Super Simplex rifle dies reload Bottle Neck rifle cartridges in two operations. Firstly the case is renecked, decapped and mouth expanded in the hardened and polished combination die. The decapping pins are made from hardened hi tensile steel tempered for strength, while expanding plugs are hardened and ground from alloy steel for long life. After recapping and filling, the bullets are seated in a seating die having both internal bullet and case