Was just BS'ing with one of my work partners and the subject came up of shooting various calibers in certain weapons, such as 38 Spec in a 357 Mag, 454 Casull in a 460 S&W, etc... I then said that I was waiting for my 10mm to show up and the subject was brought up being that it is a 40 cal on steroids and if it is possible to shoot 40 cal ammo in a 10mm? I said that I had never heard of it and am not quiet sure if I would want to expose either of my weapons to such an experiment. Now I am just wondering if anyone else has either heard or tried such and what was the result. I know that the 40 cal is a supported round and expands on the web. Thanks.