Fig. 8

Gunshot residue examinations for Pb, PbSb, PbBa, and PbSbBa from the S&W revolver; the compositions of the GSR firing PbCaSi and PbSbBa only primered ammunitions. These shots were preceded by 24 or 25 discharges of ammunitions with the same or different primer compositions (Table 2). BW, bore wipe sample; T, target sample; CG, cylinder gap sample. A The percent compositions from four bore wipe samples from series 1 through 4 (with different primers) taken after the final shot of each series. B The GSR compositions of the final shot with a Pb primer in series 5, 6, 7, 8, and 10; these samples were preceded by 23 to 25 discharges of ammunition of a different primer composition (except series 7) from the previous series. All the final shots that were GSR sampled had CuZn bullet claddings. C The two series in which the primer composition of the final shot was PbSbBa. Series 11 was preceded by 13 discharges with the same ammunition