Mike, That is a tough one and doesn’t look like it has a logical answer. So maybe think about it and ask your self a question or two. Was the wind constant all during your shots of record? You say wind was from the right, look at a compass the right side of the compass totals 180 degrees. So were from the right? Are you sure of that? What was your windage setting? You do know were zero wind is on your scope?
Also Mike I am going to post a picture of a target that has become kinda of the standard for long range shooting. This one is a copy of a target that is used by the Marine Corps since WW2. Sorry it is blurred but I had to enlarge it some. Take a look and see if there might be something on that target that might help you figure this out.
Beatiful new rifle by the way…