This two-die set is specifically designed for reloading bottleneck cases and includes a Full-Length Sizer Die with an Expander-Decapping Unit and a Seater Die with a Bullet Seater Plug. The Full-Length Sizer Die ensures the case is brought to SAAMI minimum cartridge dimensions, resizing the case body, de-priming and expanding the neck to accept the bullet. The die is equipped with vents to prevent damage caused by trapped air and excessive lubricant. It also maintains the headspace within minimum tolerances, ensuring that the case body length remains consistent during the full-length sizing process. The Seater Die features a built-in roll crimper, securing the bullet while it is seated for a reliable and consistent crimp.