The SigPro series is a picky bunch when it comes to holsters, they fit best in models specifically designed for them. Most generalized ones for railed guns are hit and miss.
I've got about 1K rounds through mine now and can't say much more than you can read on this forum on other threads about the SP's. Just clean it inside and out INCLUDING THE MAGAZINES before taking it to the range. Many do not and then start threads about encountering malfunctions. Do a little reading and the information will be easily found.
It'll digest just about anything you want to feed it. I use mostly WWB or UMC 115gr ball for punching paper and 147gr Federal Hydra-Shoks for SD/HD. Whatever you have on hand will very likely work.