Thanks. I did not intend to pose a wild hypothetical. I didn't phrase my question right.
If a BG has a large caliber, and you have a .380 and the element of surprise, is it likely you that you can disable him before he shoots you?
Or is more likely that he will NOT be incapacitated and will instead return deadly fire?
It seems this general situation could cover a wide variety of encounters: attempted carjacking, street robbery, etc. where the armed BG is not expecting you to be armed.
I apologize if my question is still inappropriate for this forum. Still learning the ropes here.