imported post
Just a little point that is often overlooked or left unsaid.
If the bad guy charges thegood guy holding a gun, the bad guy is about to come into possession of a gun. Don't matter whether he picks a gunup off a table nearby, picks a gunup off the floor, or takes it right out of the good guy's hands. The bad guy then has a gun.
And, if the gun is then taken from the good guy's hand, the good guy ain't got a gun anymore with which to defend himself against the now-armed bad guy.
If all the other elements of justified lethal force are present--jeopardy, opportunity, etc--then I think most self-defense experts will say the good guy is justified in shooting.
Also, Massad Ayoob points out in his video, Judicious Use of Deadly Force, (paraphrase) that if the bad guy thinks he has the skill to take the gun away from you, you are justified in assuming he knows his business.For example, maybe he has some training at disarming people.