shell casing design

Shell casing design involves creating the outer shell of a firearm cartridge that safely contains the propellant explosion. It must withstand high pressures, properly chamber in the firearm, and reliably feed and eject from the gun. Materials like brass or steel are chosen for durability and reusability. The design includes precise dimensions for the case body, mouth, rim, and base to ensure compatibility with the firearm and consistent performance. Additional features, such as extractor grooves and primer pockets, are incorporated to facilitate loading, firing, and extraction. Overall, casing design balances safety, reliability, manufacturability, and cost-effectiveness.