.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 mass/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]
- Jump up^ Barnes, Frank, and Amber, John T. Cartridgs of the World (DBI, 1972), p.76, “.256 Newton”.
External links[edit]