This form of ammo was introduced with much fanfare 20 or so years ago. It must have been used for real life SD problems, not lab gell situations, by now.
What is the track record on use of frangible ammo on live bad guys? What brand, how many shots, distance etc?
I would think that the ammo companies that make these cartridges would record and use the data to improve their products.
“Food for thought is no substitute for the real thing”