I just have some doubts about frangible ammo.
Way back when... the FBI designed ammo tests that used ballistic gelatin to simulate penetration in human tissue. Of course it was not an exact replication because there was no bone/cartilage/heavy muscle like there would be in a human body.
This is way they required a minimum of 12 inches of penetration to score high on the test...a round that could punch through the 12 inches of gel would likely punch through the ribcage/other tissue and reach vital organs..
They specified a max penetration of 18 inches also. The was primarily because any round that left the body of the target would not be delivering the maximum energy to the target. It is also an indication of the possibility of collateral damage.
While this is simulation is not a perfect representation of a bullets performance in a human body, it is based on solid measurements and is a good comparative tool for different rounds.
I found this YouTube video of a gel test of 9mm DRT sintered metal ammo...it was recommended by someone associated with DRT...DRT appeared to me to have a good shot at being worth while. ...In their ads the claim guys in the military started using Dead Right There as what the initials represent...
It is actually Dynamic Research Technologies http://drtammo.com/
Here is the video. Note in the testers evaluation the largest piece of the round reached about 11" of penetration, but it was a .32 caliber piece and had the weight of a .22 LR round. May get the job done, but perhaps not certain.
The round did a tremendous amount of damage in the first 4 inches or so...which could mean it will shred the flesh and muscle covering the rib cage...might be a fight stopper or might not, but not quickly fatal