The "Box of True" test were pretty good. The only thing I would change would be the distances. 2 yards (end of hall to the front door) 3 yards (closet to bedroom door), 6 yards (bedroom door to end of the hallway), 7 yards (back door to the garage door) and 9 yards (bedroom door, down the hall to the other side of living room). Wonder what would happen, if one was to use just a "rifled interchangeable choke tube" in a 20" barrel?
Using our friend the "pattern broad" it might be possible find just the right combination of load and distances for HD. I would also use a more human silhouette target to pattern the loads.
Plus, I like #4 buck shot for HD.