I use an 870 combo, rifled slug barrel with scope. It's good to 80 yards, then groups open up. I've been eyeing the h&r and the savage bolt action 20 gauge. Reviews on the savage had it grouping under an inch at 100 yards. A coworker has one and it groups around 3 inches at 100 yards, but he says that's his shooting.
Feral cat waterboarder