The Redding Slide bar Automatic Primer Feeding System is a great time saver during the reloading process. The time saving advantages of a progressive press can never be fully realized if brass is still primed by hand. With the Redding Slide Bar Automatic Primer Feeding System, brass is primed quickly and easily while it is on the press. This automatic priming system from Redding fits the Big Boss Single Stage Press and Redding T-7 Turret reloading press, and includes both large and small primer tubes and a safety shield.