Cleaning off my desk (its been a number of years) I found a box with various cartridges which I'm having trouble figuring out what for. The box is marked 7.9 mauser by Eley London and the stamp on the cartridge reads "7.9 or 8mm Eley" The bullet is fairly big - I'm thinking 180 gr or higher nickel colour blunt round nose. Any suggestions what it was used in and vintage? Thanks