Military Wiki
8inch (203mm)/50 Modèle 1924
Colbert-1-Main guns.jpg
Main guns of the Colbert
Type naval gun
Place of origin France
Service history
Used by France
Wars Second World War
Weight 20 tonnes[1]
Length 10.5 meters[1]

Shell separate charges and shell
Calibre 8inch mm
Muzzle velocity 850 m/s[1]
Maximum range 31.4 km[1]

The 203mm/50 Modèle 1924 was a medium naval gun of the French Navy.

The type was used on the Duquesne and Suffren classes of heavy cruisers as main battery, mounted in four twin turrets weighing 180 tonnes each. The calibre of 203mm (8 inches) was characteristic of heavy cruisers built as a result of limitations imposed by the Washington Naval Treaty of 1922.


These guns used two bags each containing 23.5 kg of smokeless powder with a 123-kg projectile to achieve the stated maximum range at an elevation of 45 degrees. Each gun could fire approximately 4 to 5 rounds per minute. Range was somewhat less with the 134-kg M1936 APC (armour-piercing) shell.[1]

The type was also mounted in a single twin turret aboard the Surcouf, which was designed as a submarine heavy cruiser intended to disrupt enemy supply lines. This flavour of the gun was fitted with mechanically actuated tampions to allow quick dive. These guns could open fire 2.5 minutes after surfacing and fire approximately 3 rounds per minute. Maximum elevation of 30 degrees limited maximum range to 28 km. These were the second largest guns carried by any submarine after to HMS M1 during the second world war.[1]

Weapons of comparable role, performance and era[]


  1. 1.0 1.1 1.2 1.3 1.4 1.5 Campbell, John (1985). Naval Weapons of World War Two. Naval Institute Press. p. 290. ISBN 0-87021-459-4. 

External links[]

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