Greener certainly offered it as a small game rifle, and even built box lock doubles in that calibre for blackbuck and the like. The doubles appear to have been mostly exported to India, and their uses are set out in this catalogue entry.
Some of them have been re-imported to the UK, with at least one with the engraving gold inlaid in the Indian (Kufari?) style.
Sir Gerald Burrard used this cartridge on blackbuck in India and regarded it as excellent for rabbits in the Cotswold hills where safe backstops abounded.
He doesn’t mention in his 4th edition of Notes on Sporting Rifles which type of rifle he used, although it was probably one of Greener’s nice little miniature Martinis. B.S.A. also chambered the Cartridge.