
The armor piercing projectiles in the service consist of a number of different models, varying in minor details, as manufactured by different contractors.
The metal parts assembly consists mainly of a hard steel body, a soft steel cap crimped to the body, and a false ogive or windshield threaded to the cap. The body has a cavity machined into the base to receive the filler. This cavity is closed off with a heavy base plug which seats the fuze and screws into the body behind the filler. A recess approximately 4.66 inches wide and either knurled, waved, or scored at the bottom is machined into the body a few inches above the base to receive a copper rotating band. A circular groove is machined into the base to receive a copper base cover. The bases of the armor-piercing projectiles are not tapered. The assembly of the windshields give the projectiles a large radius of ogive (varies from approx. 98 to 126 in.). If fuzes are not assembled, a fuze hole plug threads into the base plug. The lengths of projectiles vary from a little over 4 feet to approximately 5 feet.
All 14-inch armor piercing projectiles are filled with explosive D.
No information about functioning.
Nothing else to see.
TM 9-1904, Ammunition Inspection Guide (1944)