Double Naught Spy,
The forehead is a pretty small target - and a hit on the very upper portion will probably be deflected over the top of the scalp by the skull altogether. While this may still be a "stopper" (it usually is) I would aim for the middle of the nose. This is actually very close, as it happens, to the lower eyeline.
A bullet that goes high will hit an eye or the forehead anyway. A hit low, through the mouth, to the neck vertebrae will most definately result in instant incapacitation - even if the vertebrae is just "clipped" on either side. Even if it strikes the lower jaw, it will likely shatter it, and if center will probably pass on to the neck vertebrae. If it strikes anywhere on the upper jawline, nose, facial (cheeks) area close to the nose, bridge of the nose, it will likely result in instant incapacitation - even if it is temporary. There are simply not many people at all that are going to still be in the fight after taking a 9mm, .40, .45, or .38/357 slug in the face. While there are plenty of recorded cases of persons surviving and in various levels of "function" after various headshots, it is a very low percentage. And followup shots can be taken at any angle that presents itself immediately if necessary.
I have cited, in another thread, a picture I have seen of someone that took a .44 mag slug just below an eye (facial cheekbone) - it exited just below the ear same side, and supposedly this guy was able to crawl 100 yds before he expired. One thing is for sure though; he was out of the fight the instant the bullet hit him.
This is one of the reasons that although I usually carry a mag full of heavy hollow points, all reload mags are NATO-spec hardball - and I don't feel undergunned at all with a 9mm pistol loaded exclusively with NATO-spec hardball. The head (using the center of the nose from the front as the "bullseye") is a fairly decent sized target. While the center torso is obviously a larger target area; in the employment of the Mozambique drill, once two (or modified to ONE) rounds have not achieved the desired effect, I am going to aim for center-of-face, and hammer away at it.
[This message has been edited by LAK (edited 10-27-2001).]