US Cartridge, 30mm Test, M883
Automatic cannon, 30mm, M230. The cartridge is used in proof testing the weapon and barrel.
The cartridge is a high pressure test round which provides 120 percent chamber pressure to proof test the weapon and barrel. Case, primer, and propellant are identical to the target practice round. Excess pressure is achieved through a heavier 1018 steel projectile. Ogive is blunt and cartridge case is silvered to distinguish from service rounds.
Nothing else to see.