Well, as much as surprise to me as it might for you, but I just bought an MP45c and after 200-300 rounds was routinely making groups (freestyle, 12 yds) as tight or tighter than with my P220 Elite Stainless. It could have been the mood in the air or how much coffee I did or didn't have...for me it's a toss up with nearly any gun and I'd never blame the gun until I really did some shooting.
What I know for a fact is that I could grab any gun out of the case and, for self defense purposes, the gun's inherent accuracy is not a factor in hitting the target. They're all far more accurate that is needed if I can make a single hole with them at 12 yards. JMO.