I've had a disc 45 and didn't care for it, however I did use the disc more than once but the way I did it (it worked for me) was to pop the primers, throw them into a old sock, tie the sock shut and throw it in with the wash, it seemed to work for at least 3 shots after that I figured I was pushing it. I guess I also need to mention that I shoot fairly light loads 100 gr tops (90 most of the time) so if you shoot max loads they probably would stretch a bit more,