Pardon the thread jack, but for you guys who have both--can you compare the recoil sensation between the P-11 and -40?
Is a 'typical' .40 similar to a +P 9mm round?
I would stay a standard .40S&W in a P40 has stronger recoil than a 9mm +P in a P11.
Back in about 1999, I bought a .40S&W conversion kit for my P11. After shooting about 30 rounds of .40 in one shooting session, and having the skin on my right thumb knuckle being rubbed off, I promptly sold the .40 conversion.
It took me 15 years to decide to try the .40 again. This time, I was lucky enough to get a good deal on a real P40 and now I only shoot high-velocity (2000 fps), lightweight-bullet (with a 60-grain lead-free bullet) Liberty Ammunition .40S&W rounds, which have considerably reduced recoil, which I don't mind.
I have small hands and this is just my experience and my opinion and I'm sure others don't have the problems I have with the P40. Just be advised that it's a beast to fire. It may or may not be an issue for you.