Bullet Fingerprinting | 10000+ FULL |

: The hooks and pins that pull the spent casing out and toss it away leave distinct scratches on the rim. The Technology of Tracking

: Microscopic flaws in the manufacturing process or wear and tear from use create a "signature" unique to that specific barrel. 2. Impression Marks (on the casing) bullet fingerprinting

: The National Integrated Ballistic Information Network is a federal database used to share digital images of ballistic evidence. : The hooks and pins that pull the

: The raised parts of the rifling (lands) and the cut-out parts (grooves) leave parallel scratches on the bullet. Impression Marks (on the casing) : The National

Unlike human fingerprints, a gun's "fingerprint" changes over time. Every shot fired slightly alters the microscopic striations in the barrel. Experts may only fire a limited number of test rounds because the fifth shot might already look different from the first. 2. Success Rates and "Expensive Failures"

: When the gun fires, the casing is forced backward against the breech face, transferring its texture to the metal.

When a gun is fired, several mechanical actions leave distinct impressions on the ammunition. These marks are primarily categorized into two types: 1. Striation Marks (on the bullet)