So I was pretty dead set on a 10mm until reading about Mr. Harold Fish. Granted that could happen given many calibers. So I was moving back to the 9mm legion which is what I still plan on ordering next week. My question is after doing a little reading on the Sig 357, can I really just pop a $150 barrel in my legion and have a 357sig ? Using the same mags and everything? I must admit I know little about it other then it is currently not popular