OK I know the basics of MOA. A minute is roughly 1" @ 100yds, 10½" @1000yds. 360 degrees in a circle, 60 minutes per degree.
Here is where I run into trouble. Say for example you are shooting a target at 1000yds. 1000 yards would be your constant, regardless of the angle of your target in correlation to your firing location. This is what confuses me, with range being constant, wouldn't moa change incrementally due to a change in shot angle? You would essentially be changing the location of the "circle" as you changed the angle to the constant range. Or am I just trying to think to hard, and moa calculation also remains a constant regardless of the angle between you and the target.