2 Scenarios eh?
BG lives, BG dies... right?
Handgun vs. shotgun also a given point of debate...
Which would make the courts rule more favorably... California courts right?
Criminal or Civil?
Who's Prosecuting? Is he/she running for office? Judge's background? Jury Pool?
You claimed it was justifiable, either it is or it isn't. Assume IS, factor in you stopped the attack (your word) and survived.
BG in your home. Why, how, when, invited or familiar guest, stranger?
OK, there's the basis with its variables...
What was the question?
Which...
Now, did you use your Uzi with a 30 rd stick and forget to tell your trigger finger to stop or did you use grampa's .38 and only two rounds? And was BG right on you, still attacking you or was he attacking you from across the room as he waltzed right out of there carrying your whatever in both hands (here's where, if you're a Scottish Rugby man, you tackle and subdue the bad guy and await the bobbies)
If the BG lives through the first 30 rds. of 9mm or .45 from the Uzi, you'd better get the 12 ga. NY reload and prepare to get medeivel or call Buffy.
If the BG dies... whats the question again?
Conversely (did I spell that right?) Substitute differing types of smoothbores, using a single shot 20 ga. $79 Wally World special at one end or a Black street sweeper with pistol grip, folding stock, bayonet lug and tactical black heat shield and the latest laser/red-dot sight system at the other end of the spectrum.
Criminal court, show affirmative defense; ability, opportunity, jeopardy...
Civil court... If you can afford a $2000 1911 you surely can afford to compensate the poor victims family a few hundred thousand, neh? Or conversely, you're just a college student with a used .38, where's the money in that?
While it'd be fun to ponder on those points and argue it every which way, bass-ackwards and on Sundays too, we all know the right thing to do is...
(Extra Brownie points for you if you know enough First Aid to save the BG's life, or show you attempted to do so anyway, or show you could have, if you weren't worried about HIV and legal malpractice)
Have a good lawyer...
After the attack is over, make the calls... don't get too talky.
Never admit you gave this or any other advice on a firearm oriented board on this subject matter...
Whichever gun you used, can you show you took lessons and were trained with it and are currently proficient?
How bad were you hurt during the attack?
What if BG grabs you and gets control of your left or right hand/arm?
Where was your gun then?
Did you hunt him down in your darkened house/apt or did he break down your locked bedroom door while you crouched behind bed, wetting your pajamas, on cell phone waiting on 911 Dispatch? (have you ever tried to hold a little bitty cell phone in one hand while holding a 12 ga. pump in the other whilst things are going south too fast in a dark room?... me neither)
And the answer is...
I don't know, whadda you think?
When the five dogs all wake me up at 2:30 AM with frenzied barking at the front or back door, the first thing I grab is... shorts, then nightstand gun. Others might get the pump action in the corner.
When the pack does go beserk in the wee hours, it warrants a dog release and look see, you're not gonna go right back to sleep anyway till they know whats up. They might as well get a little exercise.
I can't imagine NOT having a dog or five.
But its usually a small 9mm austrian in my left hand... (right hand opens doors and turns light switches on/off) Who cares what the courts are gonna say, as long as I'm alive to hear it. I'll let the legal guys worry about their stuff if I can answer the above questions and sleep at night with the answers.
But just to be safe, I'd say in California, the answer is... no.
Adios
edited to add: Oops, I forgot, in CA no 30 rd. anything, change that to 10 rd. We here in NV don't have to deal with that particular limitation...yet