RCBS 35315 3-Die Carbide Taper Crimp Set 30 Super Carry RCBS pioneered And Developed 3-Die Sets For Straight-Wall Rifle And Pistol Cases. The Carbide Sizer Die Sizes The Case And De-primes (The Carbide Sizer Ring eliminates The Need To Lubricate). The Expander Die expands The Case To The Proper Diameter To Accept The Bullet, And It imparts Case Mouth Flare/Bell For Bullet Feeding. The Seater Die seats The Bullet And Taper crimps. Caliber: 30 Super Carry Die Type: Expander/Taper Crimp Seat Die Series: Straight Walled Cartridges In Set: 3