The result of hydrostatic shock that I believe is relevant to killing, is the physical destruction of tissue near the bullets path. As in a fist-sized hole, where the previous contents of that hole are no more, blown away, totally vaporized (as in the big hole in the zebra's heart). All caused by a bullet of expanded diameter of maybe .75".
I'm not a big proponent of, or salesman for, the idea of a shock wave causing catastrophic effects at a great distance from the bullet path, although I can't argue against the likelihood of some level of temporary nerve interruption.
