The .22 Hornet necked to .17 caliber. A tiny case producing enormous velocity for a centerfire — over 4,000 fps from a 15-grain bullet.
Type: Rifle
Introduced: 2012, United States
Parent case: .22 Hornet
Standardization: SAAMI
Bullet diameter: 0.172" (4.37 mm)
Case length: 1.349" (34.26 mm)
Overall length: 1.723" (43.76 mm)
Max pressure: 50,000 PSI
Rim type: Rimmed
Primer: Small Rifle
Typical twist rate: 1:9
Muzzle velocity: 3650–4000 fps
Muzzle energy: 500–650 ft-lbs
Effective range: 300 yd
Common bullet weights: 15.5, 20, 25 gr
Primary use: Varmint, Small Game
Production status: Active
Also known as: .17 Hornet (Hornady)
History: P.O. Ackley created the wildcat version in the 1950s. Hornady standardized it in 2012, pairing it with CZ 527 rifles. Fills the gap between .17 HMR rimfire and the larger .17 Remington centerfire.
Notable firearms: CZ 527, Ruger 77/17, Savage B17 (rimfire adapter)
Similar cartridges: .17 HMR, .22 Hornet, .204 Ruger