Assistance or opinions please on sighting my .22
I know the .22 needed sighted in. went to the range and placed a sight and see target on a box at about 10 yards. fired a few shots and they all hit about the same spot, good windage, but low. well I kept adjusting up until I hit the center of target. moved the box out to 25 yards. first shot high and right, continued to make adjustment until just above the bullseye, then moved out to 35 yards and the shots were all over the place, high right, low etc. rifle was on sandbags and solid. scope should be solid, okay I said should and will check but it was just boresighted and I believe the gunsmith said all was tight. barrel was clean when started and all the ammo was from the same box. why would it jump around like that?