When you said ignore guns that have stacked damage I think it's a good idea.

9 damage gun(BAR) = 6 shot kill
8 damage gun = 7 shot kill
7 damage gun = 8 shot kill
6 damage gun = 9 shot kill.
5 damage gun = 10 shot kill

If you live longer it encourages you to fight more strategically rather than just just spamming someone in the face.