Well, there were reports of people at the scene who were shot with through-and-through torso or limb hits that didn’t have significant internal injury, so I’m tending to seriously doubt that testing.
Do you have a way to get any of those reports? It would be valuable info. I’m not a fan of much of anything .22, other than for rats and coyotes, much preferring the tried and proven .45. My experience with .222 and .223 is that they are shallow penetrators with wicked, wicked wound channels. The .222 will penetrate the near side of a coyote, and homogenize the internal organs, and not exit, leaving only one small hole in the hide. The 5.7 lacks the velocity of the .222 by 1500 fps, so it is in fact a pretty close match to the .22 Hornet. Beef and pork respond differently than human flesh also. Again, it would be interesting to see the victims wounds.