i use Millet Angle-Loc's, for example, which are windage-adjustage rings on my rifles. if they are not properly centered over the axis of the bore then i can see where i'd have problems like you now have.
is your base properly lined up with the bore? are you rings PROPERLY put into place, centered over the bore/chamber of your Handi', with the bottom halves tightened down securely before the scope is seated in them? are you tightening the top halves of the rings in multiple steps so that they are being tightened down 'together' --- in effect. in other words, don't tighten one ring down solid before doing so with the other. go back and forth between the rings and tighten them a little at a time, alternately.
hope this helps,
ss'