 In contrast, some defense contractors, law enforcement analysts, and military analysts say that hydrostatic shock is an unimportant factor when selecting cartridges for a particular use because any incapacitating effect it may have on a target is difficult to measure and inconsistent from one individual to the next.This is in contrast to factors such as proper shot placement and massive blood loss which are almost always eventually incapacitating for nearly every individual.The FBI recommends that loads intended for self-defense and law enforcement applications meet a minimum penetration requirement of in ballistic gelatin and explicitly advises against selecting rounds based on hydrostatic shock effects.