Skip to main content
Egyptian Journal of Forensic Sciences
Fig. 7 | Egyptian Journal of Forensic Sciences

Fig. 7

From: Divergent gunshot residues and characterization of the memory effect in a .22 caliber revolver and pistol

Fig. 7

The Smith and Wesson Model 18 .22 caliber revolver. A The cylinder-barrel face showing two chambers; the chamber on the right has the bullet nose of a Remington CuZn-clad bullet. The left chamber with no cartridge has a band that corresponds to the edge of the casing (red arrow). The right chamber shows larger GSR debris as well as discoloration, representing the GSR coating. The cylinder surface has a flare that overlaps the right chamber flare (demarcation at black arrows). B The barrel face which shows a band (flare) of discoloration due to a GSR deposit (between arrows) that is heavier than the rest of the face; the revolver’s bore has a rough milled surface before the rifling which might abrade the bullet when it passes this area. Gunshot residue deposits probably associated with this rough surface and contribute to the memory effect. C The rough area (arrow) within the S&W revolver bore

Back to article page