This 2-Die Set is specifically designed for reloading bottleneck cases and ensures precision and reliability in the reloading process. It 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, sizing the outside of the case, de-priming it and expanding the neck to properly accept the bullet. The die is equipped with vents to prevent case damage caused by trapped air and excessive lubricant, ensuring smooth and efficient sizing. It also holds headspace to minimum tolerances, preventing any changes to the case body length during the full-length sizing process. The Seater Die includes a built-in roll crimper that secures the bullet while seating it, providing both a firm hold and a precise fit for reliable performance. This set offers a complete, high-quality solution for bottleneck case reloading.