ballistics
Cartridge Cases
INTRODUCTION These are almost invariably made of brass with a 75 : 25 copper/zinc alloy. Other materials including steel and plastic have been used, but not on any commercial basis. Shotgun cartridges generally have a brass base with a plastic, or sometimes paper, case.
Forensic Ballistics (Definition)
Forensic Ballistics is the branch of forensic science which deals with every aspect of firearm.