Bottlenecked revolver/carbine cartridge sharing the same concept as the .22 Remington Jet — rifle velocity from a handgun. Slightly less afflicted by the case-setback problem. Also chambered in the Marlin Model 62 lever-action carbine.
Type: Revolver
Introduced: 1961, United States
Parent case: .357 Magnum (necked down)
Standardization: SAAMI
Bullet diameter: 0.257" (6.53 mm)
Case length: 1.3" (33.02 mm)
Overall length: 1.53" (38.86 mm)
Max pressure: 42,000 PSI
Rim type: Rimmed
Primer: Small Pistol
Typical twist rate: 1:14
Muzzle velocity: 2200–2350 fps
Muzzle energy: 645–735 ft-lbs
Effective range: 100 yd
Common bullet weights: 60 gr
Primary use: Varmint, Hunting
Production status: Discontinued
Also known as: .256 Win Mag · 6.5x33mm
History: Introduced alongside the .22 Remington Jet in 1961 as competing entries in the high-velocity revolver concept. Winchester's version chambered in the Ruger Hawkeye single-shot pistol and the Marlin 62 carbine. Like the Jet, it suffered from the revolver case-setback problem and never achieved commercial success. Factory ammunition was discontinued in the 1970s. The Marlin 62 carbine is now a…
Notable firearms: Ruger Hawkeye Single-Shot Pistol, Marlin Model 62
Similar cartridges: .22 Remington Jet, .357 Magnum, .25-20 Winchester