I don't see where you shot the same load again after reinstalling the scope so I would say your problem was one of three things: 1: the rings were not seated in the bases properly for the first shots (most likely), 2: the rifle was "settling" back into the stock... probably after removal of the barreled actionfor cleaning (least likely), or 3: you failed to see that chipmunk jumping up and down on your barrel for those first shots.