[Spexxvet]

Monster has a good point. In terms of the number of deaths, there would be a wash, at best. For instance, if Bruce was in a fender bender with Maggie, and got out of his car and approached Maggie, and she was the only one armed, she might feel threatened and shoot Bruce. Or if Bruce was the only one armed, he might shoot her. Either way, there's only one dead body. The shooter would have all the time in the world to shoot, and probably wouldn't miss. If both were armed, they could rush their shots, and shoot innocent bystanders, or they could both hit their targets and kill each other. It's much more likely to have a higher body count.