Don,
Do not want to pour water on your fire but........
Shooting Trap we do have basic standards that are well documented here in the UK.
Normally shoot IM or Full, use English size 7 or 7-1/2, if you get onto the target early you can and (they do) use M & IM choke.
It is my belief that if you as the shooter do your bit your pattern WILL have sufficient density to break the clay without having to worry about one pellet breaks.
I really cannot get my head around the reasoning behind this research unless of course due to the cost of cartridges & Lead we are going to load one pellet cartridges of a size decreed by research as having sufficient energy to break all clays likely to be thrown in competition.
Good luck in your research.