I get guys all the time that ask me if the Lyman GPH 50 will shoot the paper patched 500 S&W bullets as well as the green mountains do. I really don't know, but some day I will run into some one here local and do some testing. I would really like to test the Missouri river. I had the chance to buy one in the bargain bin at Cabelas for a couple hundred dollars. I should have bought that one. Ron