The Caldwell Universal Brass Catcher S.A. is the perfect tool for any reloader or conscious shooter. This expended brass catcher conveniently fits onto bolt-action and semi-automatic rifles to allow you to focus on shooting, rather than worrying about where your brass is landing. When the bag is full (100 rounds of .223) simply use the zipper on the bottom of the bag to empty the casings into your desired container and keep shooting..