.256 Newton

The .256 Newton is a high-velocity rimless cartridge and was developed by Charles Newton in 1913 in conjunction with the Western Cartridge Company. It is a 30-06 Springfield cartridge, shortened and necked down to .264) with a different shoulder angle. However, the .256 Newton and the .30-06 are not interchangeable. The .256 Newton and the 6.5-06 are not interchangeable.