From Sporting Guns and Gunpowders: Comprising a Selection from Reports of Experiments, and Other Articles Published in the "Field" Newspaper, Relative to Firearms and Explosives, Volumes 1-2, 1897

British 1 1/8 oz. & 1 1/4 oz. Service Charge pressures + 10% for modern piezo transducer numbers

No. 4 is not equivalent but is similar to FFFg BP
Curtis and Harvey’s No. 2 (“T.S.2”) was a fine grain fast burning Black Powder somewhat similar to GOEX FFFg that produced pressures substantially above that of the standard proof Black powder.




"E.C." and "Schultze" were initially 42 grain = 3 Dr. Eq.
'S.S.' was Smokeless Shot-gun and was discarded as pressures were excessive in loads above 3 1/4 Dr. Eq.