A fired bullet and cartridge case

A fired bullet with rifling impressions from the barrel of a gun (left). A fired cartridge case and fired bullet (right). Experts can often identify the weapon used based on rifling impressions on the bullet, or breech face and firing pin impressions in the primer at the base of the cartridge case.

Fired bullet hi-res stock photography and images - Alamy

Forensic Ballistics

Bullet Setback Fears

Cartridge Case Identification

Firearm signatures on a fired cartridge case include the firing pin

Back To Basics: Centerfire Cartridge Cases

A fired bullet and cartridge case

MidiaNews Laudo aponta que arma trazida por intermediário matou advogado

Firearms Examination: Principles

Once fired, is a bullet able to be traced back to the gun or at least the make/model it was fired from? - Quora

Why Bullets are not Dangerous — Ron Spomer Outdoors

Fired cartridge hi-res stock photography and images - Alamy

ForenteQ: ForenteQ offers the BalScan system for forensic analysis of fired ammunition