| .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]
