Chuck I did misunderstand the point you were making.
But how do you know the barrel axis is pointed exactly at the POI at the instant the shot leaves the muzzle. If firing the right barrel the shot has a component of velocity to the right and that right velocity continues all the way to the forty yard target. You would have to know the velocity to the right to backtrack to where the axis of the barrel is when the shot comes out the end. I don't think we know that velocity.
Another way of putting my argument is that if you were looking down on the shooter that barrel starts rotating to the right when the shot starts down the barrel. So it has a large velocity parallel to the original position of the
rib axis of the right barrel and a small velocity perpendicular in the horizaontal plane to the
rib axis of the right barrel.
I don't think the axis of the right barrel is lined up with the POI at the time the shot exits the barrel. I think it is pointed to the left of the POI at the instant of shot exit.
Best,
Mike
Please see edit in
red
