I use the Caldwell on my AR & XCR-M. I got it for $20 at bass pro when stateside, and it works well. Just velcro's around the gun in front of the action. It will only hold so much brass before it deflects down enough to stop the cases from beign caught in the bag, but, it at least stops the cases from goign anywhere. I figured out that if I'm shooting from the bench, I can just put a plastic bin under the mesh baggie, and the cases are simply redirected into the bin. EAsy peasy. No picking up brass when doing load development for the semi's.