Don, it's been a while since I glanced over "the book" and I assume other readers here may not have even glanced. How about explaining how you or the author do testing to determine the effectiveness of one pellet hits.
Dr. Jones set up a test rig with a variable speed hand drill spinning the plastic lid off a "pot of Christmas nuts." The lid, by happen stance, was sized for a clay to "snap on" with little influence on the results. Dr. J usedanairpistolfor his velocity generator - - - about 450fps with a single pellet (in this case, size didn't matter) and based breaks on pellet energy. Clay pieces were captured in a box lined with insulation. The analysis of breaks vs non-breaks is the first attempt at defining lethal dose for a clay. Testing by Dr. J is not the end all, rather a pointer of direction. I'm planning a live firing test to extend Dr. J's currently published work. Jones' work focused on statistical analysis of the energy necessary to break a target with zone of the clay and angle of strike as variables.
As noted above, the brand/lot/design of the clay is a variable worthy of testing for understanding of lethal dose (how many pellets of what energy at what spots on the target).
The good news is that both of us are doing testing that can be repeated by others and extended as time/money/interest/usefulness indicate.
