Artillery casing question

COAL 45.13 in
Propellant Charge 9.0 lbs. SC or 10.5 lbs. NF/S (4.09 or 4.8 kg)
Muzzle Velocity 2,660 fps

My range is limiting us right now to .499 or smaller, so you'll have to wait for the grouping data until my next London visit (you take care of the paperwork to borrow the HMS Belfast).
 
OK, that makes sense. I read "41NM" instead of "4 IN M", and the N below the primer probably stands for "Naval" as it does in other British ordnance contexts.

Note for shooters - the barrel life is only 600 rounds, so you should buy a few spare barrels.

Jim
 
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