I agree with what Teamless wrote above about the perceived recoil, but with that said I still love the .40.Teamless wrote:The .40 seems to kick more than even the .45, which seems strange, but true (at least with the M&P's.
I'd add that the trigger reset on the G23 & M&P are a bit different. I have an early model M&P .40, and the trigger doesn't reset at the first 'click'. (Not certain if its been re-designed, but the newer ones that students have brought to class & I've shot don't have this problem). I'd definitely second the recommendation of another post above to test-drive at the range, or dry fire in the store before making your final decision.