Slide Bar Auto Primer Feeder by REDDING RELOADING PRODUCTS Slide Bar Automatic Primer Feeding System fits both the new T-7 Turret and Big Boss presses and makes on press priming a snap. It eliminates the handling of primers, so they do not become contaminated, and it speeds up reloading operations. Comes complete with primer pick-up tubes for large and small primers and protective safety shield. Capacity approximately 100 primers.