The cartridge was introsuced in 1909 with the idea of replaceing the 450bore in India. The cartridge worked pritty well in Mauser 98 rifles,and WR made a few double rifles for the cartridge as well, but the rebated rim presented problems in the doubles, so was dropped there, but was made for some time in the Mauser.

I can't think of a poorer choice for a double rifle, than a rebated rim cartridge! You will notice that you don't see many of the WR doubles today chambered for that cartridge. I'd say there is a reason for that fact. Most of the ones chambered that way were rebuilt to something else, and Westley Richards discontinued that chambering in their double rifles in short order. The cartridge lasted longer in bolt rifles.