The new Auto-Prime XR eliminated the primer brand restriction so any brand is now usable. The new tool shares the body from the original tool, the rest of the components have been improved or replaced. The new tool features an unbreakable comfort cure leaver, large square trays that nicely Accept all brands of primer boxes with slide on covers for small and large primers, most important, The tool features a patent pending "elevator pin". This pin safely separated a single primer from the Others and presents it for priming reducing the likelihood of a chain fire. Wanna kill these ads? We can help!