One of the famous Rigby calibers (275, 303, 350, 416) would certainly be appropriate. After all, Rigby started the whole British made Mauser thing in 1898 when Mauser introduced the 98 action. They were the exclusive distributor for Mauser from 1898 to 1912. This was the height of tiger hunting for the British Raj in India. Eliminate the 303 because it is a rimmed round. The 350 Magnum action was developed exclusively for Rigby in 1905 and the 416 appeared in 1912.