Second Focal Plane scopes change the value distances of the reticle at different power levels. Try it at just 10x or the like (doesnt have to be max power.) Dont touch that part the rest of the process. Adjust only the elevation first until shots are equal to the level of the X of your target, the 10, the center. Then make left or right windage adjustments until you are hitting the mark.
Unless your scope is tits-up and wasn't springer rated this should work provided your hold of the stock is suitable for springers. You can't squeeze the life out of them, need to hold them correctly for the reverse recoil.
This is a new shooter and while you are correct I think we have to assume he is sighting in using the center aim point of the reticle which does not move when changing power. Let’s not confuse the issue. If the scope has to “ settle in” and we assume it’s not “him” then clearly the scope is damaged . Most likely a loose reticle which is classic springerside.
