If its important to the narrative feel I would suggest skipping the damage roll, If your arch militant or somebody wants to kill some nobody in a single shot and the make the BS roll why not let them.

Even for proper combats, if you want a more cinematic feel why not consider ever gunshot that hits a minion as having done 7 damage on dice for example, less rolling and you can tailor this slightly so it feels like every hit has a real impact.