.22-250 Remington

.22-250 Remington
Type	Rifle
Place of origin	US
Production history
Designer	Grosvenor Wotkyns, J.E Gebby & J. Bushnell Smith
Designed	1937
Manufacturer	Remington
Produced	1965–present
Variants	.22-250 Ackley Improved
Specifications
Parent case	.250-3000 Savage
Case type	Rimless, bottleneck
Bullet diameter	.224 in (5.7 mm)
Neck diameter	.254 in (6.5 mm)
Shoulder diameter	.414 in (10.5 mm)
Base diameter	.470 in (11.9 mm)
Rim diameter	.473 in (12.0 mm)
Case length	1.912 in (48.6 mm)
Overall length	2.35 in (60 mm)
Rifling twist	1-12, 1-14
Primer type	Large rifle
Maximum pressure	65,000 psi (450 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 40 gr. (2.6g) BT 4,224 ft/s (1,287 m/s) 1,585 ft⋅lbf (2,149 J) 50 gr. (3.2g) SP 3,945 ft/s (1,202 m/s) 1,728 ft⋅lbf (2,343 J) 55 gr. (3.6g) SP 3,786 ft/s (1,154 m/s) 1,751 ft⋅lbf (2,374 J) 60 gr. (3.9g) BT 3,580 ft/s (1,090 m/s) 1,708 ft⋅lbf (2,316 J) 64 gr. (4.1g) Power Point 3,500 ft/s (1,100 m/s) 1,741 ft⋅lbf (2,360 J)
Source(s): Hodgdon [1]

The .22-250 Remington / 5.7x48mm is a very high-velocity, short action, .22 caliber rifle cartridge primarily used for varmint hunting and small game hunting. It is capable of reaching over 4,000 feet per second. Some jurisdictions prohibit the use of cartridges smaller than 6 mm (e.g., .243 Winchester) for deer hunting. This cartridge is also sometimes known as the .22 Varminter or the .22 Wotkyns Original Swift.^[2] Along with the .220 Swift, the .22-250 was one of the high-velocity .22 caliber cartridges that developed a reputation for remote wounding effects known as hydrostatic shock in the late 1930s and early 1940s.^[3][4]