Pope/Schalk-era wildcat associated with H.M. Pope, formed by necking up or fire-forming a .30 Winchester chamber to .33 caliber. Pope-built rifles in this configuration used .333"–.338" diameter bullets. Extremely rare; fewer than a handful of documented examples exist. More of a historical footnote from Pope's custom gunmaking era than a practical cartridge.
Type: Rifle
Introduced: 1900, United States
Parent case: .32-40 Winchester
Standardization: None
Bullet diameter: 0.338" (8.59 mm)
Case length: 2.13" (54.1 mm)
Max pressure: 25,000 PSI
Rim type: Rimmed
Primer: Large Rifle
Typical twist rate: 1:12
Muzzle velocity: 1200–1400 fps
Muzzle energy: 447–718 ft-lbs
Effective range: 200 yd
Common bullet weights: 140, 165 gr
Primary use: hunting
Production status: Obsolete
Also known as: 33-47
History: A proprietary British double rifle cartridge from the early 20th century, developed for use on medium African and Indian game. One of many specialized British nitro express cartridges that served hunters during the golden age of African safari. Rarely encountered today except in old double rifles.