But the key question is why would you even care if you go first?
Going first gives you the option to focus or draw first.
Example:
Fighters A & B. Fighter A wins the opposed Insight check and goes first.
Fighter A chooses to focus.
Fighter B can either Focus or Draw (with the low damage possibilities you described.) He chooses to Focus.
Fighter A can now Draw with +2 Attack, +10 Damage and +4 Initiative to see who shoots first, or he can focus for another +2A/+10D. He wants to do enough damage to bloody or kill Fighter B, but he doesn't want to let Fighter B get the draw on him (+4 Initiative). He Draws, hoping his +10 to damage will be enough to bloody Fighter B.
To Nytmare: I want the guns to be balanced with other ranged weapons, or at least close to balanced. I will post the guns I've created in another thread. For the purposes of this thread, you could assume they're dueling with longbows. The lethality of the duel should be part of the duel system, not part of the guns. This is just for my campaign world, I could understand a different DM wanting especially lethal guns. I want balanced ones.