Re: To Bed or Not Bed the Recoil Lug in New McMillian Edge Stock
This is a tough problem to visualize. You have to imagine that somewhere in your scope is the reticle plane (perpendicular to the optical axis) and somewhere else is the image plane. If those 2 planes do not coincide, that is when there will appear to be relative movement of the reticle on the target when you move your eye off the true optical axis in any direction. I imagine the problem is actually worse at short distances, which is where we happen to sight in and test accuracy.
If you ever owned a camera with a manual focus lens, did you notice that it took a lot of adjustment to get things focused at close range, but much less at long range, or what passes for infinity ? This is the same kind of thing So at 50, 100 and less so 200 you will have a bigger problem with parallax than at 600 or 1000 yards since those distances are approaching infinity. But this phenomenon can bedevil accuracy checking which we do at closer ranges.