RCBS STANDARD TAPER CRIMP DIERCBS STANDARD TAPER CRIMP DIESET 50 AE & 50 SW GP BFEATURES Caliber: . 50AE . 50 Smith & Wesson The 3 Die Roll Crimp Set is for loading straight wall cartridges Its steel Sizer Die sized the case & de primes Note: Cases must be lubricated The Expander Die expands the case to the proper diameter to accept the bullet, & it imparts case mouth flare bell for bullet feeding The Seater Die seats the bullet & taper crimps