This 2-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 brings the case to SAAMI minimum cartridge dimensions. It resizes the exterior of the case, removes the primer (de-primes) and expands the neck to accept the bullet. Additionally, the die features vents to prevent damage from trapped air or excess lubricant. It maintains strict headspace tolerances to ensure the case length is not altered during resizing. The included Seater Die comes with a built-in roll crimper, securing the bullet while seating it. This set ensures precise and reliable reloading for bottleneck cartridges.