If that means you walk up nose-to-nose and shoot every target point blank, so be it. If you stand still in one place and snipe them, fine. If you shoot all the guys farthest away first and save the guy standing one yard away for last, hey -- that's great! You want to stand exposed and rooted to the spot in front of a field of 40 bad guys and pick them off one-by-one? That's ok. Whatever you want to do to fulfil the requirement to put the required bullets through the given targets -- it strips down the idea of a "gunfight" into a single-faceted exercise of putting bullets on targets.