The RCBS Primer Catcher JR/RS/RC is a simple but effective device that was designed to keep your spent primers from falling to the floor. This primer catcher features a plastic lip that holds the primer catcher snugly against your reloading press to catch spent primers before they hit the floor.The RCBS Primer Catcher JR/RS/RC may fit snug against your reloading press but it removes easily whenever you need to empty it. This primer catcher was specifically designed for use with JR Rock Chucker and Reloader Special reloading presses.