I used to load 40 S&W with it on a Loadmaster. I found that the lighter weight bullets (135-150 grain) tend to fall out of the tubes when the fingers retract to capture a bullet. There is just not enough weight to prevent them from falling, even with the tubes full. Works great with 180 grain bullets, once you get it set up right, for about 80-100 rounds. If you get it, order extra feed fingers, you'll need them.