“The 256 Mannlicher (as the English labeled it) was very popular throughout the British Empire after 1900. At one time or another, practically every famous English big game hunter used it. This included military officers hunting wild sheep and markhor in the mountains of Northern India and the famous big game hunters of Africa. The most famous was probably W. D. M. ‘Karamojo’ Bell, who killed several hundred elephants using 160-grain FMJ bullet loads in a 256 Mannlicher rifle that had been rebuilt by his friend, Fraser of Edinburgh.”

There is an argument whether Bell’s 256 Mannlicher was actually for the older 6.5x53R round, adopted by the Dutch and Rumanian military, rather than the 6.5×54 rimless which was for the mannlicher-schoenauer rifle, adopted by the Greeks. My facsimile Jeffery Gunmakers catalogue from just before WW1 features both, along with Mauser’s 7×57 which Bell adopted later.