Dad has a Springfield Armory 3rd gen scope, he couldn't get the thing on the bull when sighting in yesterday after the new barrel was installed. First, the factory 308win was rechambered to 300wsm, the action trued etc. Shot fine at near middle of adjustment on elevation turret. Next, the new Pacnor 28" bbl was installed, 300wsm also. - Dad moved the front ring forward to the next slot for more room. - He used the same scope, rings, bases except for the change mentioned above. - The rifle at max adjustment would come up to 6 inches low of the bull, that's it. - He said he thought the crosshairs didn't move then jumped when dialing to get the impact to come up. - Whould the scope ring placement on the tube in the more foreward position affect any internal operations? If so how? - He has moved the ring back to the rear slot but hasn't shot it since then though. Any input appreciated.