150, 165, or 180 grain any of these are perfect for deer aslong as you are able to hit the deer in the vitals otherwise it doesn't matter if you got 200 grains because say if you hit the deer in the gut it could still get away easily I preferebly like 150s for deer that is what my dad shoots my uncle and me and we all get our deer down in 1 shot as long as we hit them in one of the vitals.