### Description

The approximate distance between a shotgun and the victim can be estimated based on wound measurements, often taken from X-rays.

range in meters for standard shotgun barrel =

= 2 * (((number of pellets in loaded shell) * ((radius of area counted in inches)^2) / (number of pellets counted in area))^(0.5)) =

= 2 * (radius of area counted in inches) * (((number of pellets in loaded shell) / (pellets counted in area))^(0.5))

range in meters for standard shotgun barrel =

= 2 * (((number of pellets in loaded shell) * ((distance between pellets in inches)^2))^(0.5)) =

= 2 * (distance between pellets in inches) * ((number of pellets in loaded shell)^(0.5))

A rule of thumb (from Figure 3, page 629, Ordog): There is 1 inch of spread for each meter in distance over range of 2 to 100 meters. A wound 14 inches in diameter was said to correspond to a distance of 12 meters.

 diameter of shot in inches number of pellets per ounce number of pellets in 1.5 oz. No. 0.05 2,385 3,577 #12 shot 0.06 1,750 2,625 #11 shot 0.08 585 877 #9 shot 0.085 485 727 #8.5 shot 0.09 410 615 #8 shot 0.095 350 525 #7.5 shot 0.11 225 337 #6 shot 0.12 170 255 #5 shot 0.13 135 202 #4 shot 0.14 #3 shot 0.15 90 135 #2 shot 0.16 #1 shot 0.18 50 75 BB 0.24 21 31.5 4 buckshot 0.25 19 28.5 3 buckshot 0.27 15 22.5 2 buckshot 0.30 11 16.5 1 buckshot 0.32 9 13.5 0 buckshot 0.33 8 12 00 buckshot 0.36 6 9 000 buckshot 0.38 410 gauge round ball 0.545 1.25 1.88 20 gauge round ball 0.610 1 1.5 16 gauge round ball 0.645 0.75 1.1 12 gauge round ball

(from Table 2, 626, Ordog)