RE: Line of Sight - Line of Bore Qn.
Nope. That's not where the angle comes from. The scope could be two feet above the barrel, and the angle between the bore and the scope (adjusted toits optical center) would be the same. It would have a dramatic effect on the angle needed to sight in for a given distance though. I'm really asking how does adjusting the scope change that angle? What are the parts in the scope that are being moved?