The most powerful production shotshell. Larger bore than 12 gauge, favored for extreme-range waterfowl hunting.
Type: Shotgun
Introduced: 1866, United Kingdom
Parent case: None
Standardization: SAAMI
Bullet diameter: 0.775" (19.69 mm)
Case length: 3.5" (88.9 mm)
Overall length: 3.875" (98.43 mm)
Max pressure: 11,000 PSI
Rim type: Rimmed
Primer: 209 Shotshell
Typical twist rate: N/A (smoothbore)
Muzzle velocity: 1050–1280 fps
Muzzle energy: 1700–2600 ft-lbs
Effective range: 60 yd
Primary use: Waterfowl, Turkey
Production status: Active
Also known as: 10 ga · 10 bore
History: One of the oldest bore sizes, standardized in the 19th century. Before 3.5" 12 gauge shells existed, the 10 gauge was the only option for extreme-range waterfowl. Still used by dedicated waterfowlers for its payload capacity.
Notable firearms: Browning Gold 10, Remington SP-10
Similar cartridges: 12 Gauge, 3.5" 12 Gauge