The RCBS Full Length Die Set for 6mm Creedmoor is designed for reloading bottleneck cases. This set consists of a Full-Length Sizer Die with an Expander-Decapping Unit and a Seater Die with Bullet Seater Plug. The Full-Length Sizer Die sizes the outside of the case, de-primes, and expands the neck to accept the bullet, ensuring it meets SAAMI minimum cartridge dimensions. The included Seater Die features a built-in roll crimper to secure the bullet while seating it.Key FeaturesIncluded Dies: Contains a Full-Length Sizer Die and a Seater Die for efficient reloading.Seater Die with Roll Crimper: The Seater Die secures the bullet with a built-in roll crimper.