Jamison Brass and Ammunition has a full quality control and quality assurance laboratory in house. The lab consists of all the gauges and tests needed to meet all caliber tolerances. Jamison follows all specifications according to SAAMI and CIP standards. The tests and measurements performed on all products assure the highest quality possible. Testing and analysis of all products begin from the moment raw materials are received all the way to the finished product as it is being packaged for sale. Jamison Brass & Ammunition manufactures cases ranging from vintage hard to find calibers to modern military, African game to Western cartridge brass and ammunition. This brass is new and unprimed. This is not loaded ammunition.
The .256 Winchester was announced in 1960 as new handgun cartridge for Ruger's "Hawkeye" single-shot handgun. It is based on the .357 Magnum pistol cartridge, but includes a bottle-neck due to being sized down. Factory loads states that it fired a 60 grain projectile at 2,760 ft/s with an ME of 1,015 ft-lbs. The .256 Winchester was also chambered in the Marlin lever-action Model 62 rifles as well as the semi-auto "Ferret" by Universal Firearms. Winchester eventually dropped production of the .256 Winchester in the early 1990s. It is an excellent cartridge for shooting varmints and small game up to 200 yards.
All specifications represent maximum dimensions.
- Rim Thickness 0.0600"
- Rim Diameter 0.4400"
- Wall Thickness 0.0140"
- Case Length 1.2800"
- Caliber: 256 Winchester Magnum
- Finish: Brass