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I once worked out the energies of a 45 ACP @ 1000 FPS with a 230 grain bullet, and a typical semi-pro middleweight fighter. Turns out the energy delivered by the boxer's fist was a bit higher than the 45 ACP. And someone like Mike Tyson in his heyday was around 2.5 times as strong as the 45 ACP.

The difference, however, is that the energy from the fist is spread out over 10 square inches and doesn't penetrate.

But the point is: if a punch won't knock you over, a shot from a pistol probably won't either - at least not from the energy transfer.

NOTE: oddball pistols like the 460, S&W500, AE50 and others are excluded as they're more of a hand cannon and really not suitable for concealed carry

But the point is: if a punch won't knock you over, a shot from a pistol probably won't either - at least not from the energy transfer.

The same amount of energy put into the bullet as it exits the muzzle is also put into the pistol and by extension the shooter as recoil.

If the bullet has enough energy to physically knock down a 200 lb man, the pistol has enough energy to physically knock down the 200 lb shooter.

NOTE: oddball pistols like the 460, S&W500, AE50 and others are excluded as they're more of a hand cannon and really not suitable for concealed carry

All of those are included, because they don't physically knock the shooter on his wallet. So they don't impart enough energy to knock a bullet-stopping zombie off if his feet, either.