That would be ideal, but it's hard to tell what constitutes being out of combat. If you go on range, it doesn't count snipers. If you go on bullet impacts nearby, it doesn't account for stray munitions, or being shot at while you're actually quite safe, on the other side of a wall or something. Who usually dies quite easily, I always kill engineers if I see them, they're one of the most problematic classes if you let them live.