I would second the Mueller APT suggestion for a .22 rifle. I have an APV on a .22 rifle and a .243 and they work fine. The APT is a step up with a 30mm tube, mil-dot, and target turrets.
For your centerfire rifles, I would pick a scope in the range of the VX-2. I could kick myself for not buying a 4-12X40AO with the B&C reticle VX-II Ifound on clearance for $250.