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Figure 9. a) firing pin impression on a cartridge fired with weapon 3 kept horizontally, with section, which combines 8 measurements for each firing pin impression to find its depth. irregularities in the apical part. b) topographical surface of the area a).

Figure 9 a) firing pin impression on a cartridge fired with weapon 3 kept horizontally, with section, which combines 8 measurements for each firing pin impression to find its depth. irregularities in the apical part. b) topographical surface of the area a).

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Technologies, USA).
Technologies, USA).
Figure 2. Micrograph of the breech face of weapon 2. Blue arrows show the firing pin hole, the pink
Figure 2. Micrograph of the breech face of weapon 2. Blue arrows show the firing pin hole, the pink
Figure 3. Comparison of firing pin impressions by weapon 2 oriented horizontally (left) and upwards downwards, while remaining clear in the rounds shot horizontally or upwards. left by the corresponding features shown in Figure 2.
Figure 3. Comparison of firing pin impressions by weapon 2 oriented horizontally (left) and upwards downwards, while remaining clear in the rounds shot horizontally or upwards. left by the corresponding features shown in Figure 2.
Figure 4. Comparison of firing pin impressions by weapon 2 oriented horizontally (left) and downwards (right). Red arrows and pink arrows indicate the marks left by the corresponding features shown in Figure 2 Figute 4. Comparison of firing pin impressions by weapon 2 oriented horizontally (left) and
Figure 4. Comparison of firing pin impressions by weapon 2 oriented horizontally (left) and downwards (right). Red arrows and pink arrows indicate the marks left by the corresponding features shown in Figure 2 Figute 4. Comparison of firing pin impressions by weapon 2 oriented horizontally (left) and
Figure 5. Comparison of firing pin impressions by weapon 1 oriented horizontally (left) and upwards (right). The blue arrows show the firing pin hole impressions.
Figure 5. Comparison of firing pin impressions by weapon 1 oriented horizontally (left) and upwards (right). The blue arrows show the firing pin hole impressions.
figure 6. Comparison of firing pin impressions by weapon 3 oriented horizontally (left) and upwards
figure 6. Comparison of firing pin impressions by weapon 3 oriented horizontally (left) and upwards
Figure 7. (left) optical comparison between the degree of flattening of ammunition fired upward an Figure 7. (left) optical comparison between the degree of flattening of ammunition fired upward and horizontally; (right) optical comparison between the degree of flattening of ammunition fired downward and horizontally. downward and horizontally.
Figure 7. (left) optical comparison between the degree of flattening of ammunition fired upward an Figure 7. (left) optical comparison between the degree of flattening of ammunition fired upward and horizontally; (right) optical comparison between the degree of flattening of ammunition fired downward and horizontally. downward and horizontally.
Figure 8. Optical images (left) and topographical profile (right) of the primer capsules around the
Figure 8. Optical images (left) and topographical profile (right) of the primer capsules around the
with the corresponding standard deviation, from 10 replicates. [In the supporting information are reported, for the three weapons and the three shooting positions, the deduced the possibility of discriminating, for each weapon, the different firing positions. reconstruction of certain types of crime dynamics.
with the corresponding standard deviation, from 10 replicates. [In the supporting information are reported, for the three weapons and the three shooting positions, the deduced the possibility of discriminating, for each weapon, the different firing positions. reconstruction of certain types of crime dynamics.
Figure 10. Topographic profiles of the depth of the firing pin impression of figure 9. The two images
Figure 10. Topographic profiles of the depth of the firing pin impression of figure 9. The two images
Table 2. Muzzle velocity of the bullet (in m/s) measured by Magnetospeed
Table 2. Muzzle velocity of the bullet (in m/s) measured by Magnetospeed
Figure 11. Indentation depth as a function of muzzle velocity. Circles: weapon 1, squares: weapon :
Figure 11. Indentation depth as a function of muzzle velocity. Circles: weapon 1, squares: weapon :
Table 3. Pressure and velocity at the muzzle measured by a pressure gauge barrel Due to the general direct correlation between pressure and bullet velocity (Figure S7 in the supporting correlation between pressure and “orientation” of the weapon.
Table 3. Pressure and velocity at the muzzle measured by a pressure gauge barrel Due to the general direct correlation between pressure and bullet velocity (Figure S7 in the supporting correlation between pressure and “orientation” of the weapon.
Figure $1. Primer shearing marks on the firing pin indentation (left column) and breech face (right) for
Figure $1. Primer shearing marks on the firing pin indentation (left column) and breech face (right) for
Figure $2. Primer shearing marks on the firing pin indentation (left column) and breech face (right) for
Figure $2. Primer shearing marks on the firing pin indentation (left column) and breech face (right) for
Table T1. Complete series of firing pin impressions depth, weapon 1 (in um)
Table T1. Complete series of firing pin impressions depth, weapon 1 (in um)
Figure $3. Primer shearing marks on the firing pin indentation (left column) and breech face (right) for
Figure $3. Primer shearing marks on the firing pin indentation (left column) and breech face (right) for
Table T2. Complete series of firing pin impressions depth, weapon 2 (in um)
Table T2. Complete series of firing pin impressions depth, weapon 2 (in um)
Figure $4. Statistical distribution of weapon 1 firing pin impression depths (green: downward - blue:
Figure $4. Statistical distribution of weapon 1 firing pin impression depths (green: downward - blue:
Table T3. Complete series of firing pin impressions depth, weapon 3 (in um)
Table T3. Complete series of firing pin impressions depth, weapon 3 (in um)
Figure $5. Statistical distribution of weapon 2 firing pin impression depths (green: downward - blue
Figure $5. Statistical distribution of weapon 2 firing pin impression depths (green: downward - blue
Figure S6. Statistical distribution of weapon 3 firing pin impression depths (green: downward - blue:
Figure S6. Statistical distribution of weapon 3 firing pin impression depths (green: downward - blue:
Figure $7. Muzzle velocity as a function of pressure, measured by a pressure gauge barrel.
Figure $7. Muzzle velocity as a function of pressure, measured by a pressure gauge barrel.
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