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 ensures the case is resized to SAAMI minimum cartridge dimensions. It resizes the case body, de-primes and expands the neck to properly accept the bullet. The die features vents to prevent damage from trapped air or excessive lubricant. It also maintains headspace within minimum tolerances, ensuring that the case body length is not altered during full-length sizing. The Seater Die includes a built-in roll crimper, which secures the bullet while it is being seated, ensuring a tight and reliable crimp for consistent performance.