.22 Savage Hi-Power

.22 Savage Hi-Power
.22 Savage Hi-Power (center) with .223 Rem (left) and .308 Win (right).
Type	Rifle
Place of origin	United States
Production history
Designer	Charles Newton
Manufacturer	Savage Arms Norma (company) Sellier & Bellot Wolf Ammunition
Produced	1912
Variants	.22 Marciante Blue Streak[1]
Specifications
Parent case	.25-35 Winchester
Case type	Bottleneck, Rimmed
Bullet diameter	.228 in (5.8 mm)
Neck diameter	.254 in (6.5 mm)
Shoulder diameter	.362 in (9.2 mm)
Base diameter	.423 in (10.7 mm)
Rim diameter	.506 in (12.9 mm)
Case length	2.05 in (52 mm)
Overall length	2.51 in (64 mm)
Rifling twist	12
Primer type	large rifle
Ballistic performance
Bullet mass/type Velocity Energy 70 gr (5 g) 2,800 ft/s (850 m/s) 1,493 ft⋅lbf (2,024 J)
Source(s): Barnes, Frank C. "Cartridges of the World." Digest Books, Inc. 3rd Edition: 1972

The .22 Savage Hi-Power cartridge, also known as 5.6×52mmR, was created by Charles Newton and introduced by Savage Arms in 1912. It was designed to be used in the Savage Model 99 hammerless lever action rifle. It is based upon the .25-35 Winchester cartridge necked down to accept a .227 in/.228 in diameter bullet. Its original loading was a 70 grain soft point bullet with a velocity of about 2790 feet per second.^[2]