A case of external beveling with an entrance gunshot wound to the skull made by a small caliber rifle bullet.

The external beveling caused by an entrance gunshot wound to the skull has not been completely explained, but the mechanism is probably a combination of several factors including the angle of shot, twisting force of a rotating bullet, blow-back effect, velocity, shape and size of the bullet, outspread of the kinetic energy from the bullet, and resistance of the skull.     

The mechanism of the formation of the bullet-entry gunshot damage to the bones of the cranial vault in shots from the TO3-10 small-bore 5.6-mm-caliber rifle

Data on experimental shots (3 series) from a TO3-10 small-gun that cause lesions of cranial vault bones are presented. It was stated that mechanism of formation of inlet bullet gunshot lesions of cranial vault bones involves several successive stages. Formation of gunshot lesion is affected by elastic bone properties and a "hydrodynamic effect".