700 Nitro Express
The cartridge was introduced in 1988 by the boutique gunmakers Holland & Holland (H&H) of London, England. It was developed by Jim Bell and William Feldstein and built by H & H. Feldstein had tried unsuccessfully to get H & H to build a .600 Nitro Express for him, but they had already ceased production. However, when Bell and Feldstein produced the entirely new 700 Nitro Express , they were able to attract the interest of H & H, which was looking for a new big-bore cartridge.
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