From Web MD...

Pathophysiology: Two factors in the mechanism of injury or kinematics in penetrating neck trauma determine the extent of damage to the tissue.

• Weapon characteristics
  • The amount of kinetic energy delivered by the wounding agent has to be considered together with its interaction with the involved tissue.
  • Kinetic energy (KE) is described by the following equation: KE = mass X velocity (squared)
  • Low-energy weapons include hand-driven weapons, such as knives or ice picks, which damage with only their sharp point or cutting edge.
  • Firearms may be classified as medium-energy (ie, handguns) and high-energy weapons (ie, military assault weapons), with the latter usually defined as having 461 joules or more.
  • Projectiles (ie, bullets, missiles) often are differentiated by mass, velocity, shape, and construction because these characteristics affect the extent of tissue disruption.
  • Bullet velocity is the most important characteristic considered, with high velocity defined as greater than 2500 ft/s.

Someone tell these folks that KE does not cause damage. And that high velocity in and of itself can be close to irrelevant. 2500 ft/s is what can be expected of a .22 magnum, a performance considered inadequate for anything other than varmintizing.

See? Educated doesn't mean smart. Seriously though, proficiency in one field does not automatically transfer to another. Hackles begin raising at the mention of "military assault weapons". You know, those relatively weak firearms that any of the hunting rifles in our safes can outperform quite easily.

I'll stop now.