Terry, I have not read one claim from a QD ring manufacturer that will claim 100% return to zero. I have read several tests that have indicated 90% return (9 out of 10 times) to correct zero. At no time during the test did the zero wander more than 1" off. It seems to me the tests were of Talley and Leupold Quick-Release rings (not Weaver type). I do not use them as I have no open sigts on either rifle I now have. That said I do believe I would get the Talley rings and bases and get the screw type QD rings. (no lever to get knocked loose in the brush and seems more dependable)