The gentleman's gauge. Between 12 and 20, lighter than 12 but more capable than 20 — a perfect upland game gun.
Type: Shotgun
Introduced: 1866, United Kingdom
Parent case: None
Standardization: SAAMI
Bullet diameter: 0.662" (16.81 mm)
Case length: 2.75" (69.85 mm)
Overall length: 3.063" (77.8 mm)
Max pressure: 11,500 PSI
Rim type: Rimmed
Primer: 209 Shotshell
Typical twist rate: N/A (smoothbore)
Muzzle velocity: 1150–1300 fps
Muzzle energy: 1100–1600 ft-lbs
Effective range: 45 yd
Primary use: Upland Game, Waterfowl
Production status: Active
Also known as: 16 ga · 16 bore
History: Popular through the 19th and early 20th centuries as the upland game gauge of choice in Europe and America. Declined after WWII as 12 gauge and 20 gauge shells improved. Experiencing a modest revival among traditionalists.
Notable firearms: Parker Double Guns, L.C. Smith, A.H. Fox
Similar cartridges: 12 Gauge, 20 Gauge