While I'd love to believe that this would be true in practice, I think in reality you'd have to spend a lot of time debunking the prosecutions claims that you're a gun nut-loose cannon-martial artist-badass who ain't afraid of nuthin. If you're painted as a dude who can defend himself, the jury will immediately doubt your need to act in self defense in a case like this.
Agree totally. Just speaking on the burden of proof in general. This case has too many unknowns for all of our internet Jurors.