I would get a short barrelled 1100 or 870 with a smooth barrel as opposed to rifled barrel and iron sights, another sight to consider is an aimpoint type sight . I would use 3"OOO buckshot or a Brenneke Rifled slug. OOO will hammer a deer out to 40-50 yards I have done it dozens of times. The Brenneke will be good to 100 yards with the smooth barrel.