When you think +P remember tha the .45 only travels at 830 FPS. Most arrows travel at 300FPS and many of those over penetrate their targets. Same goes for 9mm, fast and will over penetrate its target.
The ideal situation is to have all kinetic energy dissipate on/in target and not penetrate.
And....... if you cannot make a fast/accurate second shot because you cannot take the recoil of +P ammo then its time for a upper body workout, or join the FBI as they have all switched to the sissy 9mm........