That new Marlin round comes pretty close to matching .308 Winchester ballistics. I was reading about it the other day. Sounds like it comes within about a 100 fps of .308 loads with the same weight of bullet. If the rifle is accurate enough, it should be effective on deer out to 250 yards or so. Farther than I guy should try one probably. Put a 1.5-4.5X variable scope on and you should have a pretty good all-around deer rifle...woods and open country.