The RCBS 3-Die Taper Crimp Set is designed specifically for loading straight-wall cartridges such as the .400 Legend. The set includes a steel Sizer Die that sizes the case and de-primes, requiring case lubrication. The Expander Die expands the case to the proper diameter for bullet acceptance and imparts a case mouth flare for easy bullet feeding. The Seater Die seats the bullet and taper crimps for proper cartridge headspacing.Key FeaturesIncluded Storage Box: Comes in a durable green storage box for organized storage.Hardened Steel Sizer Die: Features a hardened steel Sizer Die, ensuring durability and precision (case lubrication required).Expander Die: Properly expands the case to accept bullets, enhancing the loading process.Taper Crimp Seat Die: Provides a taper crimp for proper cartridge headspacing, ensuring reliability.Manufacturing Standards: All RCBS dies are machined to exacting tolerances and finished to the highest industry standards.