"the Webley round was intended to inflict a wound bad enough to make the recipient unable to return fire, but to require the assistance of two stretcher bearers, an ambulance driver and attendant, hospital orderlies, surgeons, nurses, ward attendants and an entire staff of service people."
Sorry, John, I don't think that is the case at all.
Why?
Because the .455 Webley was developed and adopted during the height of British Colonial involvement, with the vast majority of combat occurring against native troops who didn't have stretcher bearers, ambulance drivers, ambulances, hospital orderlies, or even hospitals, surgeons, etc.
The Webley, just as with the American .45, with its heavy bullet was seen as a very effective way of stopping an attacker up close. That was why the Webley was developed and adopted.
But even the .455 Webley was found to be wanting in the Sudan, so a new bullet was developed for it, essentially a massive hollowpoint slug of pretty much pure lead called the Manstopper.
And, in another nod to British colonial and general racial views of the time, the British felt that it was just fine to use this round against the "native savages" (actual quote from a British book describing this round) but it was NOT ok to use this round against troops from "Civilized" (read white) nations.