Bushnell, simmons, and Tasco all make good rimfire scopes.....just make sure it IS a rimfire scope or has an adjustable objective. Most big game scopes have their parallax set for 100 yards. Rimfire scopes, it's set for 50 yards, your most common median range for shooting a .22. Using a fixed objective big game scope on a .22 can cause some 'walking' on target at 75 yards and under....you can lock the gun in a vise, put the crosshairs on the target, then move your head slightly forward, back, and side to side while leaving the rifle still and watch the crosshairs shift off the target. This means that if you aren't EXACTLY welded in the same spot every time you pull the trigger, you can be off target through no fault of your own. Many times it's not critical....but if you are trying to shoot a squirrel in the head at 50 yards wiht a rifle that groups an inch @ 50 with a scope that has some parallax issue of an inch @ 50, then you are gonna see some issues on occasion. :mrgreen:
Here's a thought: Let the ducks work and decoy.