Yes there was. I have read about it a number of times. One reference to it is in the class rules for the Big Game Rifle Club. .577/.450 Martini Henry must use the 'express' load.

If I get time on the weekend I'll explore this further, meanwhile I'm sure other members will post in with first-hand knowledge.

BTW, the rifle pictured certainly looks like it should be chambered for the express cartridge. Very nice! Does it carry a maker's or retailer's name? I have a similar specimen with full-length rib in .303 by Army & Navy. Love it dearly!