Redding Big Boss II Reloading Press Redfield The positive spent primer retention Calibre:375cal The positive spent primer retention system ensures that no primers are spilt on the work area and the Zerk fitting is conveniently located for lubrication when required Available in service and match configurations Frame Material Cast Iron Press Type Single Stage Priming Feature Yes Handle Location Bottom Right Hand Spent Primer Collection System Yes Die Size Accepted 1 1 4" 12 without Bushing The Redding Big Boss II Press is built with some of the same features as the original Boss press but built on a heavier frame with a larger ram and more usable ram stroke to make loading large magnum cartridges a breeze