Measurement of the skin temperature at the entry wound by means of infrared thermography. An investigation involving the use of .22- to .38- caliber handguns.

This study examines the temperatures at the point that bullets impact human skin. With the assistance of infrared thermography, measurements were taken after shots were fired by .22-, .25-, .32-, .38-special-caliber, and 9-mm Luger pistols and revolvers. The highest temperature readings at the entry point were recorded with the .22 caliber and the lowest with the .32 caliber. The measurement of projectile temperatures in flight resulted in readings of 147 degrees-152 degrees C for the 9-mm Luger.