I've used .308 for about thirty critters(mostly deer and a few elk and moose). I used the.35 whelen & .356 for a dozen more, mostly elk and moose. My brother shot 6 elk and 2 moose with his .358. I'd say that the .308 is entirely adequate for any deer size animal, but the .35 caliber bullet is noticeably better at taking big animals.
