In 1962, the 7mm Remington Magnum rifle round and the new Remington Model 700 bolt-action rifle were both made commercially accessible. It belongs to the family of belted magnums, which originated with the venerable.375 H&H Magnum. The belted magnum design, which was inspired by the.300 H&H and.375 H&H Magnum, was originally intended to give exact headspace management because sloping shoulders, while making cartridge extraction easier, were inappropriate for this use.