I have shot 357sigs thru glocks. All I did was change the barrel. A 357sig is really nothing more than a bottleneck 40S&W down to 9mm bullet.
You use the same mag for 357sig that you use for 40S&W. Not sure about 9mm.
I recommend staying away from 357sig if you want reloads to work. This caliber is a major headache due to the small neck tension. Factory loads would be ok, I guess.