Dan, Those are interesting photos, what they show is a load that is completely out of tune in picture 2. The big question is why? You make the statement “Velocity reducing oil”. May be the problem may not be. You would need to verify this by shooting this series again. If it in fact does repeat itself then you are really on to something. Then I would like to see this series shot over a Chronograph to see if there is that big of a difference. Rifles are like people in some ways, no two are alike. None of my rifles requires so many shots to settle in.
If you look at those pictures and the difference between #1 and #2 I would never ever guess that your problem was with how clean the barrel was. Look at the difference 6 times as much elevation difference, and 3 times as much windage. Hummmm !!!