Agreed Miller. I've read both Brister and Burrard and their data is similar. As I recall, Brister makes more of a deal of it.
The thing that struck me is that target motion takes your neat little 30" circle and makes it an ellipse from the viewpoint of the target.
A target with a crossing velocity component of 30 MPH equates to 528 inches/second. A six foot shot string at 800 fps passes the target in .0075 second. During that time the target moves 4". Does not sound like much, but that's 13% of the diameter of the commonly used 30" patterning circle.
It sort of makes the guys holding a clay target over a pattern 'void' look silly.
It's a crap shoot how many pellets a target might collect out of the shot swarm, but as you indicate the first order of business is to give your pattern a chance in the first place.
