On the WWI era British S&Ws made in 455 (either first or second version) what was done later to convert the cylinder to 45 acp/moons or 45 autorim? The case diameters of all these cartridges appear to be pretty close to the same diameter (.476+/- a few thou). The case/cartridge lenghts are different, however. Was the chamber just lengthened? Was the cylinder shaved to change headspace? Can you still fire 455 in a converted gun? Thanks

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Randy
Provenance nerd