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SCENARIO
An officer has been trained under the “single aiming point belt-buckle” philosophy. A 40 gram projectile with a velocity of 300 fps generates 120 ft lbs of energy and displaces a block of gelatin approximately five (5) inches.
Assuming that the gelatin is an accurate representation of the abdomen, consider the implications of the “single aiming point” mentality. The 230 pound male measures 12 inches from front to back, while the 100 pound female measures just five (5) inches. If both subjects are both hit with the same projectile in the same location, (i.e. single aiming point”) will they both experience the same potential for injury? The answer is of course NO. They would however experience the same speed of body deformation, but would experience dramatic differences in displacement due to the dramatic difference in actual body mass present.
The projectile delivered to the 230 pound suspect would displace approximately five (5) inches of tissue, which constitutes less than half of the available body mass. The projectile delivered to the 100 pound suspect would screech to a halt against her spine, and anything caught in the path (i.e. liver, or spleen) would suffer the consequences. Same fact pattern, dramatically different risk!
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