This 2-Die Set is designed for reloading bottleneck cases, offering both precision and efficiency 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 is engineered to bring the case to SAAMI minimum cartridge dimensions, resizing the outside of the case, de-priming it and expanding the neck to properly accept the bullet. It also features vents that prevent potential case damage caused by trapped air or excessive lubricant, ensuring a smooth reloading experience. The die maintains headspace within minimum tolerances, preventing any changes to the case body length during full-length sizing. The Seater Die includes a built-in roll crimper, allowing the bullet to be securely seated and crimped at the same time for a tight, reliable fit. This set provides a comprehensive solution for reloading bottleneck cases with consistent, high-quality results.