I don't know if it's hydrostatic shock or something else, but a fast moving projectile causes a big hole through vital tissue. I have killed or seen killed a bunch of critters with slow moving large diameter projectiles such as shotgun slugs and 50 cal muzzleloaders and the wound cavity is typically larger by a high velocity centerfire of even relatively small diameter such as 24 or 25 cal. Doesn't necessarily always result in drop at teh shot results, but I don't buy the argument that velocity doesn't buy you anything other than trajectory.
Lou
