Historic American varmint wildcat developed by Harvey Donaldson around 1934, based on the .25-20 Single Shot case necked to .22 caliber. One of the foundational high-velocity .22 centerfire wildcats, historically significant in pre-WWII precision and varmint shooting.
Type: Rifle
Introduced: 1934, United States
Parent case: .25-20 Single Shot
Standardization: Wildcat
Bullet diameter: 0.224" (5.69 mm)
Max pressure: 25,000 PSI
Rim type: Rimless
Primer: Small Rifle
Typical twist rate: 1:14
Muzzle velocity: 3000–3400 fps
Muzzle energy: 900–1410 ft-lbs
Effective range: 300 yd
Common bullet weights: 45, 50, 55 gr
Primary use: varmint
Production status: Active
Also known as: R-2 Lovell · .22 Lovell · R2 Lovell
History: An experimental wildcat cartridge developed by R2 Lovell for ultra-long-range varmint shooting. Based on modified military surplus brass blown out to remove body taper. Achieved extremely high velocities for the caliber; primarily of academic interest as few rifles were ever chambered for it.