I agree with Seafire and Rob if a lot of your shots will be past 100 yards.

If most shots will be 100 yards or less I would sight-in for 80 yards to prevent missing high on the small targets. Then I would see where the dots fall in the distance at 9x power.

I haven't shot my 22 Mag in a while. Thinking about it makes me want to break it out for some exercise.

Nifty-250

"If you don't know where you're going, you may wind up somewhere else".
Yogi Berra