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Egyptian Journal of Forensic Sciences
Fig. 9 | Egyptian Journal of Forensic Sciences

Fig. 9

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

Fig. 9

A Box plot GSR compositions of the final discharges from series 5 through 11 (Table 2) from the revolver for CuZn and Cu-associated GSR; the bullets were CuZn clad for these final discharges. Left, the combined percentage CuZn composition of the particles in the samples for these seven samples is similar for the bore wipe, target, and cylinder gap. The cylinder gap data has an extreme outlier. Right, Cu without detected Zn for the combined seven series showed no concordance between the bore wipe, target, and cylinder gap categories. The bore wipe data has an extreme outlier. B Box plots of GSR counts per second (CPS) for the final shot of series 6 for Cu and Zn-associated GSR for the bore wipe (right) and target (left) samples; at the right of each graph are the numbers of particles for which each metal was detected. Those particles with Zn did not have detectable Cu and vice versa

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