I have the Simmons 3X9X32 22 Mag scope with A.O. on my Ruger 10/22. For the $65 I paid for it, the thing is remarkably clear and precise. It holds zero perfectly even through some bumps and bruises while hunting. The adjustable objective works very well. I will say that it pays to get a good solid name brand pair of scope rings to mount it with and you'll be good to go.
__________________ Fear is a Reaction..............Courage is a Decision