.264 in (Bad rounding hereScript error: No such module "Math". mm)
Neck diameter
.291 in (Bad rounding hereScript error: No such module "Math". mm)
Shoulder diameter
.418 in (Bad rounding hereScript error: No such module "Math". mm)
Base diameter
.471 in (Bad rounding hereScript error: No such module "Math". mm)
Rim diameter
.473 in (Bad rounding hereScript error: No such module "Math". mm)
Rim thickness
.049 in (Bad rounding hereScript error: No such module "Math". mm)
Case length
2.440 in (Bad rounding hereScript error: No such module "Math". mm)
Overall length
3.40 in (Bad rounding hereScript error: No such module "Math". mm)
Rifling twist
1 in 10"
Primer type
large rifle
Ballistic performance
Bullet weight/type
Velocity
Energy
123 gr (Script error: No such module "Math". g)
3,103 ft/s (Bad rounding hereScript error: No such module "Math". m/s)
2,632 ft·lbf (Bad rounding hereScript error: No such module "Math". J)
140 gr (Script error: No such module "Math". g)
3,000 ft/s (Bad rounding hereScript error: No such module "Math". m/s)
2,800 ft·lbf (Bad rounding hereScript error: No such module "Math". 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[]
↑Barnes, Frank, and Amber, John T. Cartridgs of the World (DBI, 1972), p.76, ".256 Newton".
