I used to use a shotgun for deer hunting when I lived in Upstate/Western New York. Remington 870 with a Hastings Rifled Barrel. I used 3" Mag BRI .50 Saboted Slugs. Tac driver @ 50yds. No scope. Our whole hunting party (8) pretty much had the same rig and we all loved them. The only reason I would hunt big game with a shotgun would be because rifles arent allowed. Ever thought about a Muzzle Loader? I have a T/C Omega (no scope, just a peep) and out to 150yds, I am very confident. With a scope, you may be able to get out there even more. You only get one shot but thats all you should need. Just a thought.