k im going to try my first match this weekend its ispc and im probably going to go in the stock class. i have an xdm9 that came with the mag holders and that funny holster and stuff. I have 3 magazines which would total 57 rounds to use at a time. do you need a mag holder for each magazine so you can have your gun empty at times? is there any funny business they might have that i wont be expecting?