Ballistics wouldn't mean squat. You walk up to someone and shoot them in the head, and then tell the police they verbally threatened you and no witnesses saw anything, according to the laws in which you praise, you will walk.
Actually, having a weapon means nothing. Someone can walk up to you, who I assume carries a gun all the time, and shoot you in the head, and tell the police you threatened him with that weapon you carry, and if there are no witnesses to dispute his claim, he will walk.
You better hope no thugs and criminals find out about this law, assuming many of them don't know about it already.
Do I really need to google the exact scenario you described and show the criminal is convicted?
You keep what if'ing. How in the world would I say the other guy threatened me with my own weapon when all evidence said he didn't? You DO know the preponderance of evidence rules regarding self defense, right? It's been explained in this thread 100s of times.
I think you're letting your emotions run wild instead of thinking logically and rationally.