It really sounds great...and if it performs as well as it is advertised, I'd be using it...but I don't know that it does.
All of that damage in the first 4 inches might just cause surface injuries, but it could just as well cause a traumatic collapse of the rib cage damaging the heart and lungs, which would be a quick fight stopper
A shot to the gut might shred intestines, liver, pancreas, spleen and anything else in the area. While that might not be quickly fatal, it might stop the fight right then....or it might do damage to skin and muscle..
I have not seen unbiased tests to determine how it does perform.
I have seen tests and verification on the street that the modern SD rounds (my choice is Hornaday Critical Defense or Corbon DPX) will be fight stoppers near or above 90% of the time with +.40 caliber rounds and approaching that with 9mm rounds.
Without similar verification of the effectiveness of frangible ammunition, in particular that made by DRT, I won't give up the 90% effectiveness of traditional SD ammunition for a +10 possible. but unverified, maximum gain.
And I am not saying the tests results aren't out there, I just have not found them.