Just be carefull that it's not just that the front ring is lower by .010, that would be different than tapered. If they are both flat with one lower you will only be holding on the front of one ring and the back of the other and trying to bend your scope. it's a much different scenerio than a tapered base. If you lapped your rings a little you could see how much contact you are getting. with .010 just laying your scope in there and looking at each side of the ring it might be noticable. I would be leary of tightening the scope down until you know for sure.