The .264 Winchester Magnum is a belted, bottlenecked rifle cartridge. Apart from the .257 Weatherby Magnum, it is the smallest caliber factory cartridge which uses the standard length (in ( mm)) Holland & Holland belted magnum case. It was introduced together with the .338 Winchester Magnum and the .458 Winchester Magnum as one of a series of short-cased (in ( mm)) belted magnum cartridges developed by Winchester. It was officially introduced to the public by Winchester in 1959.