.256 Newton

From Wikipedia, the free encyclopedia
Jump to: navigation, search
.256 Newton
Type Hunting
Place of origin United States
Production history
Designer Charles Newton
Designed 1913
Manufacturer Western Cartridge Company
Specifications
Parent case .30-06 Springfield
Case type Rimless
Bullet diameter .264 in (6.7 mm)
Neck diameter .291 in (7.4 mm)
Shoulder diameter .418 in (10.6 mm)
Base diameter .471 in (12.0 mm)
Rim diameter .473 in (12.0 mm)
Rim thickness .049 in (1.2 mm)
Case length 2.440 in (62.0 mm)
Overall length 3.40 in (86 mm)
Rifling twist 1 in 10"
Primer type large rifle
Ballistic performance
Bullet weight/type Velocity Energy
123 gr (8 g) 3,103 ft/s (946 m/s) 2,632 ft·lbf (3,569 J)
140 gr (9 g) 3,000 ft/s (910 m/s) 2,800 ft·lbf (3,800 J)
Source(s): Newton Arms Company Catalog. 14th edition, 1920. IN Barnes, Frank C. "Cartridges of the World" Digest Books Inc., 1972.

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[1] 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.

References[edit]

  1. ^ Barnes, Frank, and Amber, John T. Cartridgs of the World (DBI, 1972), p.76, ".256 Newton".

External links[edit]