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 resized to meet SAAMI minimum cartridge dimensions. It resizes the outside of the case, de-primes and expands the neck to allow for easy bullet seating. The die features vents to prevent damage caused by trapped air or excessive lubricant. The headspace is maintained within minimum tolerances, ensuring that the case body length remains unchanged during the sizing process. The Seater Die comes with a built-in roll crimper, which securely seats and crimps the bullet in one smooth operation, ensuring a consistent and reliable crimp for optimal performance.