I have a used 35P. I set it up yesterday to check some 22-250 loads. After removing the bolt and looking through the barrel, I shot two shells.(I was doing a 2 shot powder test) and recorded the firat two shots. The printer did not work, I know there is an upgrade. The issue is, using my windage top, I moved to the second target. This time, only recording one velocity. Would moving that little cause the velocity to be missed?