This 2-Die Set is specifically designed for reloading bottleneck cases, ensuring 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 sizes the outside of the case, de-primes and expands the neck to the proper dimensions to accept the bullet, all while bringing the case to SAAMI minimum cartridge specifications. The die is equipped with vents to prevent damage caused by trapped air or excess lubricant, providing smoother reloading. Additionally, it maintains strict headspace tolerances, ensuring no change to the case body length during full-length sizing. The Seater Die features a built-in roll crimper, securely holding the bullet in place while it's seated, for reliable and precise ammunition preparation.