If the shooter even manages a wound.
The pistol is a difficult weapon if you never train.
Just put the thing away, and you might as well throw it at the target.
And using a knife to kill effectively comes naturally? I don't buy it.
A pistol is an incredibly easy weapon to use. Handguns were designed to be easy to use. Even with minimal instruction at 10-15 ft its pretty much point and click. Especially a revolver. Try shooting one sometime.
Never bring a knife to a gunfight.