It is common to have dispersion with a double rifle unless you are shooting the load it was set up for at the factory. In other words, a double rifle is set up with one specific load to where both barrels shoot to the same point at 100 yds. With a 30-06 that may be with 150 gr, 165, 180, 0r 200 gr bullets. I would contact the manufacturer and find out what load the gun is set up with and you will find the 'sweet spot' where both barrels shoot to the same place. You may also need to determine if it is a Rem or Winchester, etc load. Good luck, it will make you very happy when it all comes together! (pun intended) 44 Man