I may have posted in the wrong forum for questions on a 10 mm. to .40 cal. S&W. I don't know if there is a commercial conversion of this type? Has anyone done one of this cal.? If so how well did it work, and what all did it involve? I assume since both rounds head space on the case mouth, it would involve separate barrels? Ejectors? I had acquired a .40 cal S&W magazine, some time ago, but never went ahead with the project. Does this conversion seem feasible? Thanks.