This two-die set is 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 resizes the case to SAAMI minimum cartridge dimensions, ensuring the case is properly sized, de-primed and the neck is expanded to accept the bullet. The die also features vents that help prevent case damage caused by trapped air or excessive lubricant. It maintains headspace to minimum tolerances, ensuring the case body length remains consistent during the sizing process. The Seater Die includes a built-in roll crimper, which secures the bullet while it is being seated, providing a secure and consistent crimp for reliable performance.