Thanks for the replies. I shoot IDPA with a Glock 34. It is certainly an ideal pistol for SSP. I've met some USPSA guys while shooting steel, and I like the idea of shooting with a red dot every once in a while.
I have no experience with a single-action pistol. Sounds like I need to branch out. Gerry, I'm surprised you said 9mm. Isn't there a disadvantage in shooting minor?
So if not USPSA open, what competition might the M&P40L pro-series C.O.R.E. excel in?