"I put three holes in his head to stop him from killing me."
The opposing lawyer would eat that up--makes it look like you deliberately killed the guy.
Hint--if your intent is to KILL the other guy, even if in defence of your own life, you still will likely go to jail. You should NEVER be trying to kill the other guy; your goal when shooting in self-defence is ONLY to stop the aggression.
Deliberately putting three holes in somebody's head looks like a bit more than halting the aggression. That looks like....voluntary manslaughter. I'd give you a 50/50 chance in such a scenario. Depends on how good the respective lawyers are.
(A) No person, while under the influence of sudden passion or in a sudden fit of rage, either of which is brought on by serious provocation occasioned by the victim that is reasonably sufficient to incite the person into using deadly force, shall knowingly cause the death of another or the unlawful termination of another's pregnancy.
(B) Whoever violates this section is guilty of voluntary manslaughter, a felony of the first degree.
--From the ORC. Granted we're talking about Nevada--for the purposes of discussion, I assume Nevada statutes are similar.
When you shoot in self-defence, aim for the center of mass. Larger area to hit, and somewhat less likely to be lethal than a head shot.
J_A_B