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