I was trying to say that if he shot him in the head to start off with, it would have been over a lot sooner. I also want to point out that you can shoot a head size target effectively and quickly with the proper training and practice. But most people CHOOSE to settle for "center of mass" quality of hits in their training and practice. Shooters with that poor of a pistol shooting skill level probably do need a hail of bullets sent down range to luck into a head shot hit. I also want to point out the fact that for the average shooter it would take them WAY longer to perform a magazine change than it would for them to simply aim and press off a single head shot.

The way I see it you can Aim and make a quality hit or sling lead in the general direction of your target and hope to get a hit. One method is going to produce more consistent results than the other so choose wisely.