This 2-Die Set is designed specifically for reloading bottleneck cases, offering accuracy and efficiency. The set 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 that the case is resized to SAAMI minimum cartridge dimensions, properly sizing the case, de-priming and expanding the neck to securely accept the bullet. It is equipped with vents to prevent damage from trapped air or excessive lubricant during the sizing process. The die also maintains strict headspace tolerances, preventing changes in case body length during full-length sizing. The Seater Die features a built-in roll crimper, which securely crimps the bullet as it is seated, ensuring a tight and consistent seal. This set provides a comprehensive solution for reloading bottleneck cases with precision and reliability.