Wounding capacity of muzzle-gas pressure

Area of Science:

• Forensic Science
• Ballistics
• Trauma Research

Background:

• Suicidal gunshot wounds from 9-mm Luger pistols, even with full metal jacket bullets, cause severe head injuries.
• Direct muzzle contact exacerbates injury patterns.

Purpose of the Study:

• To investigate the additional wounding potential of muzzle gases from a 9-mm Luger pistol.
• To quantify the effects of muzzle gases on ballistic trauma.

Main Methods:

• Wound ballistic experiments using 15 gelatin-filled head models with silicon coating.
• Firing a 9-mm Luger pistol with expanding bullets at varying distances (0 cm, 10 cm, 2 m, 4 m).
• Analyzing projectile deformation and gelatine disruption using Fackler's Wound Profile and polygon procedure methods.

Main Results:

• Projectile deformation was regular, and acrylic spheres shattered but were contained by the silicon.
• Gelatin disruption was more extensive in muzzle contact shots compared to distant shots.
• Crack lengths in the gelatin were 31% to 133% longer in contact shots, particularly in the initial bullet path.

Conclusions:

• Experimental findings confirm that muzzle gases possess significant wounding capacity.
• Muzzle gases contribute to increased tissue damage in close-range gunshot incidents.
• Understanding muzzle gas effects is crucial for accurate forensic analysis of ballistic trauma.