Description
This cartridge is fired from 90mm guns and is designed for use against face-hardened armored materiel.
The hardened steel projectile has a flat base and a nose shaped to a relatively short ogive. It is fitted with an armor-piercing cap. A small cavity in the rear portion of the body holds a small explosive charge and is threaded to receive a delayed-action base-detonating fuze with tracer. The cartridge is loaded with one of two different primers and a varying amount of propellant, with or without an igniter charge depending on the velocity desired.
The projectile is olive drab with a black band and yellow markings.
Functioning
When the weapon is fired, the resultant burning propellant creates gases which propel the projectile out of the gun tube and ignite the tracer which burns for a minimum of three seconds of projectile flight. The armor plate of the target is penetrated by the hardened face of the armor-piercing cap solely by kinetic energy. The softer core protects the hardened point of the projectile body by distribution of stresses. The base-detonating fuze, a simple inertia type, functions with delay action detonating the explosive filler after projectile penetration.
Hazardous Components
Cartridge case - M19
Propelling charge - M6, (7.31 to 8.06 lb, 3.32 to 3.66 kg)
Primer - M28A1, M49
Physical Data
Length, overall - 38.24 in, 971.3 mm
See Also
Source(s)
TM 9-1300-203, Artillery Ammunition (1967)
TM 9-1904, Ammunition Inspection Guide (1944)
