.222 Remington Magnum

Type

Rifle

Place of origin

United States

Production history

Designer

Remington

Designed

1957

Produced

1958–Present

Specifications

Parent case

.222 Remington

Case type

Rimless, bottleneck

Bullet diameter

.224 in (5.7 mm)

Neck diameter

.253 in (6.4 mm)

Shoulder diameter

.357 in (9.1 mm)

Base diameter

.376 in (9.6 mm)

Rim diameter

.378 in (9.6 mm)

Case length

1.850 in (47.0 mm)

Overall length

2.280 in (57.9 mm)

Rifling twist

1-12 in (300 mm)

Primer type

Small rifle

Maximum CUP

50,000^[1] CUP

Ballistic performance

Bullet mass/type	Velocity	Energy
40 gr (3 g) SP	3,818 ft/s (1,164 m/s)	1,295 ft⋅lbf (1,756 J)
50 gr (3 g) SP	3,476 ft/s (1,059 m/s)	1,342 ft⋅lbf (1,820 J)
55 gr (4 g) SP	3,294 ft/s (1,004 m/s)	1,325 ft⋅lbf (1,796 J)

Test barrel length: 24"
Source(s): Hodgdon ^[2]

The .222 Remington Magnum was a short-lived commercially produced cartridge derived from the .222 Remington. Originally developed for a US military prototype ArmaLite AR-15 rifle in 1958, the cartridge was not adopted by the military, but was introduced commercially in sporting rifles.

YouTube Encyclopedic

1/5
Views:
68 330
1 381
25 455
23 035
59 038

Transcription

Development

The .222 Remington Magnum was created by lengthening the case and shortening the neck of the highly accurate and very popular .222 Remington cartridge, which dominated varmint and benchrest shooting during the 1950s. Case capacity is about 20% greater than that of the .222 Remington, producing moderately higher muzzle velocities. The .222 Remington Magnum served as the basis for the German-developed 5.6×50mm Magnum sporting cartridge.

History

During the late 1950s, ArmaLite and other U.S. firearm designers started their individual Small Caliber/High Velocity (SCHV) rifle experiments using the commercial .222 Remington cartridge. When it became clear that there was not enough case capacity to meet U.S. Continental Army Command's (CONARC) velocity and penetration requirements, ArmaLite contacted Remington to create a similar cartridge with a longer case body and shorter neck. This became the .222 Special. At the same time, Springfield Armory's Earle Harvey had Remington create an even longer cartridge case then known as the .224 Springfield. Springfield was forced to drop out of the CONARC competition, and thus the .224 Springfield was released in 1958 as a commercial sporting cartridge known as the .222 Remington Magnum. To prevent confusion among all of the competing .222 cartridge designations, the .222 Special was renamed the .223 Remington in 1959. In the spring of 1962 Remington submitted the specifications of the .223 Remington to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI). With the U.S. military adoption of the M16 assault rifle in 1963, the .223 Remington in a slightly derived form was standardized as the 5.56×45mm NATO. As a commercial sporting cartridge the .223 Remington was introduced in 1964.^[3]^[4]

Obsolescence

The .223 Remington cartridge has a shorter neck and the shoulder is moved back slightly compared to the .222 Remington Magnum. Case capacity is about 5% smaller than that of the .222 Remington Magnum, but it was loaded to a slightly higher pressure, so the two have essentially identical ballistics. As any widely used military cartridge is guaranteed to be a success on the commercial market, the .223 Remington sold exceptionally well and the .222 Remington Magnum faded rather quickly. In Europe SAKO produces the cartridge and some gun manufacturers offer the chambering. In the United States Remington continued to offer the .222 Remington Magnum in a couple of target and varmint rifle models for many years, but currently there are no commercial manufacturers in the U.S. either of rifles or ammunition in .222 Remington Magnum other than Cooper Firearms of Montana. For many .222 Magnum shooters handloading of this cartridge provides ammunition, using components otherwise available for the other more popular .22 centrefire rounds. The .222 Remington Magnum cartridge case became the parent case for a new development introduced in 2004, the .204 Ruger. The .204 Ruger is based on the .222 Remington Magnum case necked down to hold a .20 caliber (5 mm) bullet.^{[citation needed]}

References

^ ".222 Remington Magnum" (PDF). Accurate Powder. Western Powders Inc. Archived from the original (PDF) on 28 September 2007. Retrieved 21 September 2010.
^ Hodgdon Online Reloading Data^{[permanent dead link]}
^ "The 5.56 X 45mm: 1957–1962 A Chronology of Development by Daniel Watters". Archived from the original on 26 December 2014. Retrieved 19 November 2016.
^ "The 5.56 X 45mm: 1963–1964 A Chronology of Development by Daniel Watters". Archived from the original on 18 February 2007. Retrieved 19 November 2016.

Speer Reloading Manual #11, Omark Industries, Inc., 1987
Cartridge Dimensions^{[permanent dead link]}

External links

.222 Remington and .222 Rem Mag at Chuck Hawks

Remington firearms and cartridges

Rifles

Bolt-action	.22 Junior Special JuniorTarget 521TL Remington–Keene rifle M1903 Springfield rifle Pattern 1914 Enfield M1917 Enfield Model 5 Model 6 Model 7 Model 30 Model 34 Model 504 Model 511 Model 512 Model 513 Model 521 Model 580 Model 581 Model 582 Model 600 Model 660 Model 673 Model 700 Model 710 Model 720 Model 721 Model 770 Model 788 Model 798 Model 799 M24 Sniper Weapon System M2010 Enhanced Sniper Rifle Modular Sniper Rifle
Pump-action	Model Six Model 14 Model 121 Model 141 Model 572 Model 572 Fieldmaster Model 760 Model 7600
Semi-automatic	Nylon 66 Model Four Model 8 Model 24 Model 241 Model 522 Model 552 Model 597 Model 740 Model 742 Model 7400 Model 750 R4 R5 Remington Gas System Model R-25 RSASS
Automatic	Adaptive Combat Rifle
Single shot	Rolling block

Shotguns

Pump-action	Model 10 and 29 Model 17 Model 31 Model 870 Model 887
Semi-automatic	Model 11 Model 11-48 Model 58 Model 878 Model 1100 Model 11-87 Model 11-96 Model SP-10 SPR 453 Versa Max V3
Break-action	SPR 18 SPR 94 SPR 100 SPR 210 SPR 220 SPR 310

Handguns

Semi-automatic	1911 R1 Model 51 R51 RM380
Revolver	Model 1858 Model 1875 Model 1890
Derringer	Model 95 Rider Single Shot Pistol Zig-Zag Derringer
Other	Naval Model 1865 Pistol XP-100

Cartridges

Cartridges derived from the .222 Remington or its derivatives

First generation

Second generation

Based on .223 Remington/5.56 NATO	.17-223^x .17 Remington 4.3x45mm DAG 4.32x45mm SPIW 4.7x45mm DAG 4.85x49mm .19-223^x .20 Tactical .22 TCM 5.56×21mm PINDAD .223 Ackley Improved 6×45mm^x 6mm TCU^x .25-45 Sharps .25 Ugalde 6.5mm TCU^x .277 Wolverine 7mm TCU^x .300 Whisper 7.62×37mm Musang 7.62×40mm Wilson Tactical .30 TCU^x
Based on .221 Remington Fireball	.17 Mach IV^x .17 Remington Fireball .20 VarTarg^x .300-221/.300 Fireball .300 AAC Blackout .338 Whisper

Note: ^x = Wildcat cartridge

This page was last edited on 28 December 2023, at 23:32

From Wikipedia, the free encyclopedia