US Cartridge, 57mm Smoke WP, M308, M308A1
This cartridge is used in 57mm recoilless Rifles M18A1 and M18 and is intended primarily for screening and spotting.
WP Cartridge M308A1 includes a perforated cartridge case containing a plastic liner and a percussion primer. The propelling charge is loosely loaded into the plastic liner. The cartridge case is crimped to the projectile just behind the pre-engraved rotating band. A steel adapter forms the front end of the projectile. The burster is press-fitted into the adapter, and the fuze is threaded into the adapter. The projectile is filled with white phosphorous.
Nothing else to see.
Collaborative Ordnance Data Repository