Hey guys, so I have a G33 (.357SIG), with 3 mags. I bought a 9mm conversion barrel and a 9mm mag to save $ at the range. In my opinion the 9mm is very similar to the .357 when shooting, but it doesn't cost $1 a round! So I wanted to practice reloading from the belt yesterday to brush up on my skills (god forbid I would ahve to reload in a tactical situation!), and it was getting expensive using the .357, but I cant use the 9mm because I only have one 9mm mag. SO, I know that this may not have been the smartest move, but I put a couple 9mm bullets in the G33 .357 mag "just to see what would happen". They fit, and the gun cycled normally. Is it a "bad idea" or is it harmful or dangerous to load my .357 mags with 9mm for practicing? Anybody with extensive glock knowledge please chime in on this one. It worked fine, but I am wondering if it is smart? Thanks!