I have a Leupold 2.5 x 8 VariX-III, on my 12 gauge H & R Ultra Slughunter. If you are going to shoot any of the new longer range sabot rounds, I would go with something around this power. Don't scrimp on the scope though, 12 gauges are hard on scopes, buy a good one or you will be sending them back to the manufacturer to replace/repair reticules.