Obscure British single-shot sporting cartridge. Very limited historical documentation. Collector interest only.
Type: Rifle
Introduced: 1879, United Kingdom
Parent case: None
Standardization: None
Bullet diameter: 0.299" (7.6 mm)
Case length: 1.54" (39.12 mm)
Max pressure: 18,000 PSI
Rim type: Rimmed
Primer: Large Rifle
Typical twist rate: 1:10
Muzzle velocity: 900–1050 fps
Muzzle energy: 126–172 ft-lbs
Effective range: 200 yd
Common bullet weights: 70, 80 gr
Primary use: hunting
Production status: Obsolete
Also known as: 300 Sherwood · 7.6×39mmR
History: A specialized proprietary cartridge developed in the late Victorian era for the Sherwood self-contained shotgun system. Very low velocity black powder load designed for quiet pest control use. One of many specialized Victorian cartridge variants that did not survive the transition to smokeless powder.