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  1. #11
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    As I understand it the British pounds was the designed weight of shell around which the gun was created, it then became a way of having two guns of similar calibre but having different uses ie the 12pr and 13pr and 3in 20cwt all the same cal. and the 17pr and 77mm. 2pr AA and 40mm S gun.

  2. #12
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    Quote Originally Posted by highlandotter View Post
    True, we used a lot of French WW1 guns, but we used the inch designations along side of metric. Almost all of the coast defense guns were in inches , along with the 8" guns and howitzers of the Army. Not til NATO was the metric measurement used exclusively. The Navy used inches until after WW2 except for light AA guns. Bombs were in pounds, also. The changes to metric use has not changed for every day use.
    The USN still uses inches: see the current 5 inch gun: http://www.navweaps.com/Weapons/WNUS_5-62_mk45.php

    The reason that some US artillery was measured in inches and some in metric is mainly to do with age: the older guns had inch calibres and they kept them. From WW1 onwards most if not all new artillery were metric. So in WW2 you got the 3 inch anti-tank gun (which used the same ammo as a pre-WW1 gun), followed by the 76mm.

    This habit of keeping old inch measurements still applies for US small arms: the .45 Auto is still the .45; the .50 Browning is still the .50; the .300 Win Mag keeps that name because that was the civilian name for it.

  3. The Following User Says Thank You to Tony Williams For This Useful Post:

    FZG76 (16th May 2018)

 

 
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