Description
This fixed ammunition is intended for use in 76mm gun cannons against armor.
The projectile consists of a dense core of tungsten carbide steel, covered with a steel sheath, and a base and sleeve assembly called a sabot. The core is held in place inside the sabot by a sheet steel release spider. The projectile is inert, except for a tracer contained in the base. It is assembled to a steel cartridge case, which is loaded with a triple-base propellant and has a percussion primer. A distinguishing characteristic of these rounds is the cartridge case-over-band construction. The specially designed rotating band has a crimping groove which permits the cartridge case to be assembled over the rotating band and rigidly crimped to it.
The projectile is black with white markings.
Functioning
When the cartridge is fired, a setback ring moves rearward opening the release spider. Setback holds the sabot and core together until exit from the gun, at which time centrifugal force separates the sabot from the core. The tracer, ignited by the propellant, provides a visible trace during the first few seconds of flight. Upon impact, the projectile sheath crumples and the tungsten carbide core penetrates the target.
Hazardous Components
Cartridge case - M331A2: M88B1, M331A1: M88
Propelling charge - M17 (5.57 lb, 2.53 kg)
Primer - M58 percussion
Tracer - M5 (M331A1); M5A3 (M331A2)
Physical Data
Length, overall - 30.88 in, 784.4 mm
See Also
Nothing else to see.
Source(s)
TM 9-1300-203, Artillery Ammunition (1967)
