RCBS 3 DIE SET WITH ROLL CRIMPRCBS 3 DIE SET WITH ROLL CRIMP444 MARLIN GP CFEATURES Caliber: . 444 Marlin 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 & roll crimps