Tejano,
Sorry, I am not usually a spelling Nazi, but Ross's last name is Seyfried (pronounced SIGH-fred), not Siegfried. But am also willing to believe you were the victim of auto-spell correction.
There is no such thing as hydrostatic shock, as it was first defined many years ago, as resembling brake fluid suddenly and violently going throughout an animal's veins and arteries--and often promoted by people like Roy Weatherby. There is, however, a phenomenon called cavitation that actually exists--which results in more damage to animal tissue, and varies considerably due to expanded shape and impact velocity. I explained the basics in Gun Gack II, in the chapter on solid bullets.
A flat (or even cupped) frontal area results in more tissue damage from cavitation than a rounded front.
