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40×311mm Round

40×311mm rounds are used with the L/60 Bofors cannon.

PGU-9/B

The PGU-9/B High Explosive Incendiary round is the main ammunition used the L/60 Bofors cannon equipped on the AC-130 gunships. This is a newer version of a World War II era ammunition, which means it combines decades old components with a fuze that is safer and more reliable than the original model. However some of the brass cartridge cases have production date stamps dating back to 1944.

Characteristics

Dimensions
Cartridge length: 447 millimeters 17.6 inches
Cartridge diameter: 62 millimeters 2.44 inches
Cartridge case length: 311 millimeters 12.24 inches
Projectile diameter: 40 millimeters 1.57 inches

PGU-49/B High Explosive Incendiary

The PGU-49/B High Explosive Incendiary (HEI) Cartridge used by U.S. Air Force Special Operations Command in the M2A1 L60 Gun System found on the AC-130 gunship. It is an untraced projectile crimped to a brass case which is effective against personnel and light vehicles.

Characteristics

Dimensions
Overall length: 447 millimeters 17.6 inches
Features
Muzzle velocity: 880 meters per second 2 887 feet per second
Miscellaneous
Cartridge case: Brass

PGU-50/B High Explosive Incendiary

The PGU-50/B High Explosive Incendiary (HEI) Cartridge is used by U.S. Air Force Special Operations Command in the M2A1 L60 Gun System found on the AC-130 Gunship. It is an untraced projectile crimped to a brass case which is effective against personnel and light vehicles.

Characteristics

Dimensions
Overall length: 447 millimeters 17.6 inches
Features
Muzzle velocity: 880 meters per second 2 887 feet per second
Miscellaneous
Cartridge case: Brass

M81A1 Armor Piercing Incendiary

The M81A1 Armor Piercing Incendiary (API) Cartridge is used by the U.S. Air Force Special Operations Command in the M2A1 L60 Gun System found on the AC-130 Gunship. It is an untraced projectile crimped to a brass case and is the current training substitute for the PGU-9 HEI, PGU-49/B and PGU-50/B. The incendiary tip provides impact signature which aids in training as a spotter round. This round is also effective against tanks and light armored vehicles.

Characteristics

Dimensions
Overall length: 447 millimeters 17.6 inches
Features
Muzzle velocity: 880 meters per second 2 887 feet per second
Miscellaneous
Cartridge case: Brass
Penetrator: Steel slug
Propellant: M1 Single-based granular