Took a P38 sitting on the runway and set the target at 50yds. Fired ~1000rnds of 20mm and got this dispersion. I don't know much about ballistics but I can't imagine why it would have the line on the right with lots of rounds going above and hardly any below. I saw the same thing from 50cal and 151/20, and in both wing and fuselage mounted guns. I took this shot by going to external view and looking at the target from behind, so from the pilot's point of view it is reversed ledt to right.
