Being a civilian CCW carrier I rely on others in the firearms field that test ammo performance (note I did note say stopping power) to some, but not all, of the performance criteria the FBI uses for selection of ammo.
For the non-LEO/civilian scenarios I may encounter, I look for posted results of 10% gelatin/4-layers of denim testing of ammo that meets the minimum penetration distance of 12 inches. I don't factor in one-shot stop percentages, recovered expanded diameter, foot pounds of energy, etc. Nor do I care about wet phone book or water jug testing of ammo. My choice in carry caliber starts at .38spl and goes up from there.
The rest is up to me; using a reliable firearm, good training & regular practice, proper mindset, and (I hope) the ability to recognize the deadly threat I'm confronted with and respond accordingly.
Although his ammo testing is performed mostly for LE duty use, I do read and pay attenion to the ammo postings/recommendations of DocGRK.
regards