GunnyUSMC
Member
Matching cartridge cases from a Beretta 92 or 96 was always challenging. Most often the match was made from the firing pin strike and the ejector mark.There was a police department that ordered Glocks with an "artifact" in the barrels so they could be identified. Just to the department or to the individual cop, I don't recall.
A Beretta primer will have a soft rounded "crater" because the firing pin hole is chamfered to keep the case rim from snagging on a sharp edge as it comes up out of the magazine.
Sig-Sauers are prone to firing pin drag and will have a teardrop shaped indent.
Walther brass will have a perceptible bottleneck, the chambers have a faint step.
But no doubt there are others similar.
Sigs tend to have a light drag mark. But the markings are not to hard to match up.
Now the S&W M&P marks great. The cut at the bottom of the firing pin aperture, no the breach face leaves a beautiful drag mark.
The Gen5 Glocks have a slight flat spot just before the shear marks
A lot of the Taurus guns are easy to identify.