Several years ago the Courtneys tried to get the wound ballistics community to buy into their ballistic pressure wave theory. It went nowhere. IIRC, they tried to claim that WWI "shell shock" was the result of ballistic pressure wave, when "shell shock" was the term used to describe PTSD back then. Doc Williams posted a review on the Courtneys ballistic pressure wave theory. He reviewed all the references they cited to support their claims and found issues with how they were represented. This was years ago. I did a cursory search but can't find his review. But, in short, ballistic pressure wave and handgun bullets is junk science. That's why it went nowhere.