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US Cartridge, 90mm AP-T, M318, M318A1, T33E7

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Description

This armor-piercing cartridge is for use in 90mm guns against armored materiel.

The body of the projectile is made of hardened steel, has a flat base, and has a nose that is shaped to a relatively short ogive. A lightweight aluminum windshield is welded to the projectile. The base of the projectile is threaded to receive a tracer. The cartridge case is loosely packed with propellant, and the base is fitted with a percussion primer. An igniter to assist uniform propellant ignition is fitted below the closing disk.

The projectile is black with white markings.

Functioning

When the weapon is fired, the 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 projectile is designed to penetrate the target solely by kinetic energy.

Hazardous Components

M318:

Cartridge case - M19, M19B1

Propelling charge - M6 (8.6 lb, 3.9 kg)

Primer - M49 (T33)

Tracer - Red, M5A2, M5A2B1

M318 (T33E7), or M318A1:

Cartridge case - M108, M108B1

Propelling charge - M17, M30 (8.6 lb, 3.9 kg)

Primer - M58

Tracer - Red, M5A2, M5A2B1 or M13

Physical Data

Length, overall (M318) - 37.43 in, 950.7 mm

Length, overall (T33E7 or M318A1) - 37.11 in, 942.6 mm

See Also

Nothing else to see.

Source(s)

TM 43-0001-28, Artillery Ammunition, Guns, Howitzers, Mortars, Recoilless Rifles, Grenade Launchers, and Artillery Fuzes (1994)

TM 43-0001-28, Artillery Ammunition, Guns, Howitzers, Mortars, Recoilless Rifles, Grenade Launchers, and Artillery Fuzes (1977)

TM 9-1300-203, Artillery Ammunition (1967)