Table 1 Number of shots fired and GSR sampling for the S&W Model 18 revolver and Ruger MKII pistol. For the S&W revolver, eleven shooting series and samples were taken as indicated. One spent casing from each brand was sampled to determine the primer composition. The Peters Golden Bullet analysis was performed on unfired primer. A bullet from each ammunition lot was examined in the SEM to determine by EDS the presence of an antimony (Sb) layer (marked with an “X” if present and a “0” if not. Bullets lacking cladding of Cu or CuZn were designated “0.” Key: Fed. Federal, Rem. Remington, Win. Winchester, BW bore wipe, T target, CG cylinder gap
# | Bullet | ||||||
|---|---|---|---|---|---|---|---|
Series | Fired | Brand | Primer | Sb layer | Cu/CuZn | Comments | |
1 | 40 | Fed. Lightning | PbSbBa | X | 0 | Final shot BW sample | |
2 | 18 | Aguila | PbCaSi | 0 | Cu | Final shot BW sample | |
3 | 24 | Fed. Power-Flite | PbSbBa | X | 0 | Final shot BW sample/same lot series 5 | |
4 | 24 | Fed. Lightning | PbBa | 0 | 0 | Final shot BW sample/same lot series 6 | |
S&W | 5 | 24 | Fed. Power-Flite | PbSbBa | X | 0 | No GSR samples |
Model | 2 | Peters Golden Bullet | PbCaSi | X | CuZn | Final shot BW & T samples/same lot series 6, 7, & 8 | |
18 | 6 | 24 | Fed. Lightning | PbBa | 0 | 0 | No GSR samples |
Revolver | 2 | Peters Golden Bullet | PbCaSi | X | CuZn | Final shot BW & T samples/same lot series 5, 7, & 8 | |
7 | 24 | Peters Golden Bullet | Pb | X | CuZn | Final shot BW, T, & CG samples/same lot series 5, 6, & 8 | |
8 | 24 | Fed. Lightning | PbBa | X | 0 | No GSR samples | |
2 | Peters Golden Bullet | PbCaSi | X | CuZn | Final shot BW, T, & CG samples/same lot series 5, 6, & 7 | ||
9 | 24 | Win. Wildcat | PbBa | X | 0 | No GSR samples/same lot series 10 | |
2 | Rem. Golden Bullet | PbSbBa | X | CuZn | Final shot BW, T, & CG samples/same lot series 10 & 11 | ||
10 | 24 | Win. Wildcat | PbBa | X | 0 | No GSR samples/same lot series 9 | |
2 | Peters Golden Bullet | PbCaSi | X | CuZn | Final shot BW, T, & CG samples/same lot series 10 & 11 | ||
11 | 14 | Rem. Golden Bullet | PbSbBa | X | CuZn | Final shot BW, T, & CG samples/same lot series 9 & 10 | |
Ruger | 1 | 15 | Fed. Power-Flite | PbSbBa | X | 0 | No GSR samples/same lot S&W series 3 |
MKII | 2 | 4 | CCI | PbBa | X | 0 | No GSR samples |
Pistol | 3 | 12 | Rem. Golden Bullet | PbSbBa | X | CuZn | Breech GSR shots 1, 2, 4, 5, 6, 11, and 12 |
4 | 20 | Aguila | PbCaSi | 0 | Cu | Breech GSR shots 4, 8, 12, 16, and 20 |