3.7 inch Ammunition Specs

[50CAL]

G'Day All,

I am looking for the cartridge case dimensions for the 3.7 inch AA guns as used for air defence in Australia during WW2.
Can anyone help?

 

[Tony Williams]

You can find them in the Ammo Data Tables here: http://www.quarry.nildram.co.uk/ammotables.htm

The normal case for the 3.7" AA was the 94 x 675R with a 135mm diameter rim. I don't know whether or not Australia got the later high-velocity Mk 6 which used a 94x857R case with 150mm rim.