This comprehensive 2-die set is purpose-built for reloading bottleneck cartridges with precision and repeatability. It includes a full-length sizer die equipped with an expander decapping Unit to return brass to SAAMI minimum dimensions-sizing the case body, de-priming spent primers and expanding the neck for bullet seating-all in one pass. Vent holes integrated into the die body allow for air and lubricant displacement, preventing pressure build-up that could damage cases. Headspace is tightly controlled to minimize case length changes. The included seater die features an integrated roll crimper that securely crimps the bullet during seating, ensuring proper case mouth tension and reliable feeding. Threaded to standard 7/8 inches -14 for reloading die compatibility Built from proprietary die steel for exceptional durability and long-lasting performance Includes full length sizing die and bullet seating die for precision reloading Sizing die reshapes brass cases to SAAMI specs for safe, uniform reloading Ships conveniently packed in a green die box