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Diagram of 51 lb 8 oz 1/2 charge Cordite cartridge Mk I, for British BL 9.2 inch Mk IX & Mk X naval and coast defence guns.
This cartridge is an example of the earlier type of "composite" cartridges made up of multiple sizes of Mk I Cordite, discontinued at time of publication.
Diameter 8.25 inches, length 32.5 inches.
Contained 49 lb 8 oz cordite Mk I size 44, 2 lb cordite Mk I size 3 3/4.
The advantage of composite cartridges was originally believed to be that this enabled a larger charge to be fired, increasing muzzle velocity, without increasing chamber pressure. Ballistics were also believed to vary less with change of temperature.
Date
data correct as at 1 August 1914
Source
Based on Plate XII and pages 75, 86 in "Treatise on Ammunition" 10th Edition 1915.
Facsimile reprint by Imperial War Museum and Naval & Military Press, 2003.
Author
War Office, UK
Permission (Reusing this file)
Crown Copyright expired (50 years)
Public domainPublic domainfalsefalse
This work created by the United Kingdom Government is in the public domain.
This is because it is one of the following:
It is a photograph taken prior to 1 June 1957; or
It was published prior to 1974; or
It is an artistic work other than a photograph or engraving (e.g. a painting) which was created prior to 1974.
HMSO has declared that the expiry of Crown Copyrights applies worldwide (ref: HMSO Email Reply) More information.
See also Copyright and Crown copyright artistic works.
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Rcbutcher
{{Information |Description=Diagram of 51 ll 8 oz 1/2 charge Cordite cartridge Mk I, for British BL 9.2 inch Mk IX & Mk X naval guns. |Source=Based on Plate XII in "Treatise on Ammunition" 10th Edition 1915. <br>Facsimile reprint by Imperial War Museum an
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