I've shot the 40, which has a sharp recoil. The 45 recoil differs with the size and weight of your weapon. The 9MM is the least of the recoil, and carries more ammo than the latter handguns. I also have a Glock 29 in 10 MM that I switch with a 357 Sig conversian BBL. This weapon (the G29) coupled with the 357 Sig Ctg is VERY good. The recoil is low, and the velocity of the Ctg is WAY UP there, with mild recoil, utilizing the G29 frame, matched with the 357 Sig conversian BBL.
Just my 2 cents worth here