This 2-Die Set is specifically designed for reloading bottleneck cases and consists of a Full-Length Sizer Die with an Expander-Decapping Unit and a Seater Die with a Bullet Seater Plug. The Full-Length Sizer Die is engineered to bring the case to SAAMI minimum cartridge dimensions, resizing the case, de-priming and expanding the neck to properly accept the bullet. The die also features vents that help prevent damage to the case by allowing trapped air and excess lubricant to escape. To ensure precision, headspace is maintained to the strictest tolerances, preventing any change in the case body length during full-length sizing. The Seater Die is equipped with a built-in roll crimper to securely crimp the bullet while simultaneously seating it, making this set ideal for reliable and consistent reloading.