I was under the assumption that a ladder test was more related to whether or not the scope was mounted exactly perpendicular to the bore axis and tracking properly through the vertical and relative to what is actually dialed in with your elevation turret. Check out Brian Litz's Youtube video on performing a proper ladder test. I would say shoot for proper bullet grouping and precision then do your ladder test. If your scope is not tracking perfectly through the vertical then your group is going to move.
Thanks