I don’t own a double; however there are some very good rules to keep in mind. Keep the scope light and low, and don’t over scope. I think your right on track with you idea for a Leupold 2-7 compact, Leupold 1-4, Leupold 1 1/2 - 5 or Leupold 1 3/4 – 6. Don’t over look a 4x or maybe a 6x I would not get any higher than that. Just MOH.