This two-die set is designed for reloading bottleneck cases and consists of 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 meets SAAMI minimum cartridge dimensions. It resizes the outside of the case, de-primes and expands the neck to properly accept the bullet. The die includes vents to prevent damage caused by trapped air and excessive lubricant. Additionally, the headspace is maintained within minimum tolerances to prevent any changes to the case body length during full-length sizing. The included Seater Die features a built-in roll crimper, securing the bullet while it is seated for a consistent and reliable crimp.