The Study of Bullets and Cartridge Casings
{"Image DocumentName": "The Study of Bullets and Cartridge Casings", "Image ImageDescription": "How is each fired bullet marked? As a gun is fired, the barrel marks each bullet with its own unique pattern of lands and grooves. 2. What is the procedure to match a spent bullet to the firearm that shot it? Investigators compare bullets and spent cartridges shot from the suspected firearm. To get a known bullet for comparison, they test-fire the weapon. What makes up a test-firing, and why is it done? Investigators test-fire the weapon into a water tank or gel block. This captures the bullet without damaging it. Then, they can compare the markings on known bullets with those on the suspect bullets.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}