I have a Simmons 44mag 6.5-20x-44 and I tried two styles of Millet rings on the new Ruger 10/22 Ruger with the Weaver base and it was such a hassle to align the Millets that I gave up and ordered a set of Simmons rings. I could not find a set of rings in my metropolitan area to mount this scope to the Ruger so I had to mail order. I tried a Leupold base but it required tapping another screw hole in a reciever that already had 4 factory holes so I took the Leupold back rather than tap a 5th hole. Millet rings do not get along well with Weaver bases even though the Millet packaging says it's for Weaver bases. I will only use a ring setup that is easily removed and put back without excessive readjustments. Anybody have this problem?