When resizing and depriming cases, it’s important to have a place for spent primers to go, and the Forster Primer Catcher Cap and Cup is purpose-built for use on your go-to co-axial press. These catchers are essential to have on-hand when working with your press, either as a handy spare or to replace a worn, well-used primer catching tray on your reloading press. Mfg: Forster