I bought a Nikon Pro Staff 2-7x32 to put on of my .22's. Very nice scope for the money. I tried to adjust the parallax down to fourty yards - no problems with that - but the carrier stuck out past the body of the scope and it wouldn't allow the ring to be screwed down all the way. It left a big gap between the body and the ring which I just didn't like.

One other tip. After re-setting the parallax - re-adjust the crosshair focus with the occular lense. In a couple of scopes it seemed to have an effect. I could be wrong though, if does actually have an effect or not. It's worth checking anyway.