I have only used the 9mm mags in mine with no other changes and no problems at all. You should do some range time before trusting your life to it.
I have had excellent results, also, using the .357 Sig with the .40 mags.
"Peace is that brief, glorious moment in history when everybody stands around reloading". Anonymous
Earp: Not everyone who knows you hates you.
DOC: I know it ain't always easy bein' my friend....but I'll BE THERE when you need me.