I had my M&P9c out Saturday and consistently shot low and left when shooting with my right/strong hand. I normally shoot a full size M&P45 just fine. I adjusted how my finger was on the trigger so it was more center pad and that took care of the problem. I didn't realize that with the smaller gun my finger didn't naturally fall in the same spot as the .45. It doesn't take much to be wrong.
"What kind of man would put a known criminal in charge of a major branch of government? Apart from, say, the average voter." - Terry Pratchett