AR Zero issue

[Haxby]

If the scope tilts front to back it will effect POI. If the scope is tilted up or down, it will change elevation POI for the other point at which the bullet crosses line of sight. No different than someone using the wrong FSB, F or non-F marked. It will have a different vertical POI.

2 identical rifles. One has a mount that is correct. The other is tilted. Both sight in at 50y. They will have different points at which the bullet crosses the line of sight on the way down.

I know that you understand the trajectory, but this is not correct. The height of the scope affects the distances at which the bullet crosses the line of sight for a given zero range. The slant of the mount does not.

Go to a ballistic calculator. Same sight height, velocity, distance, etc. It won't give you a different result if you are using a 20moa rail.