.223 Remington

.223 Remington
The38superdude · CC BY-SA 3.0 · source
Name	.223 Remington
Origin	United States
Designer	Remington Arms
Design date	1957
Production date	1964–present
Parent	.222 Remington
Case type	Rimless, bottleneck
Bullet diameter	0.224 in (5.7 mm)
Neck diameter	0.253 in (6.43 mm)
Shoulder	0.354 in (8.99 mm)
Base	0.376 in (9.55 mm)
Rim diameter	0.378 in (9.60 mm)
Case length	1.76 in (44.70 mm)
Overall length	2.26 in (57.40 mm)
Primer	Small rifle
Max pressure	55,000 psi (SAAMI)

.223 Remington The .223 Remington is a small-caliber, high-velocity centerfire rifle cartridge developed in the United States in the mid-20th century. It became widely adopted for sporting, law enforcement, and military purposes, influencing rifle designs, ammunition industries, and shooting disciplines. Its popularity led to extensive development of rifles, optics, and accessory markets across North America and Europe.

History

The cartridge traces to research by Remington Arms and the Frankford Arsenal alongside experiments at the Armalite company, during an era when the United States Army sought lightweight, intermediate cartridges influenced by experiences from the Korean War and observations of the Soviet Union's developments. Early work involved the .222 Remington as a parent case and collaboration with designers linked to Eugene Stoner and engineers from Armalite and Colt's Manufacturing Company. Civilian introduction occurred in the 1960s through commercial offerings by Remington and subsequent adoption in sports such as those governed by the National Rifle Association of America and shooting competitions overseen by organizations like the International Practical Shooting Confederation.

Cartridge design and specifications

The .223 Remington employs a small rifle primer and a rimless, bottleneck case derived from the .222 Remington. SAAMI-standardized dimensions set case length and overall length consistent with magazines used in modern sporting rifles by manufacturers such as Colt's Manufacturing Company, FN Herstal, Heckler & Koch, and Smith & Wesson. Pressure limits are specified by SAAMI, while the CIP provides alternate European proofing protocols affecting headspace and chamber dimensions used by firms including Blaser and Steyr Mannlicher. The cartridge's external geometry influences bolt face design in bolt-action rifles from makers like Remington, Ruger, and Sako and auto-loading systems in designs by Armalite and FN Herstal.

Ballistics and performance

Typical factory loads for the cartridge launch bullets in the 40–90 grain range, with common sporter and varmint bullets between 40 and 62 grains and match bullets in 69–77 grain weights used for precision by competitors in events organized by USA Shooting and Small Arms Firing School programs. Performance metrics—muzzle velocity, ballistic coefficient, and energy—vary by barrel length and bullet design, with profiles compared by ballistics labs at institutions such as NBS-era testing facilities and private companies like Hornady, Nosler, Federal Premium Ammunition, and Winchester. Effective ranges for different roles (varmint control, target shooting, competition) are influenced by external ballistics tables used by shooters from clubs like the National Shooting Sports Foundation and international teams participating in matches governed by the International Shooting Sport Federation.

Firearms and chambering

A broad array of firearms have been chambered for the cartridge, from AR-platform semi-automatic rifles popularized by Eugene Stoner's designs at Armalite and commercialized by Colt's Manufacturing Company, to bolt-action rifles from Remington, Ruger, Savage Arms, Tikka, and Howa. Law enforcement agencies such as the FBI and some municipal police departments evaluated or adopted rifles in this chambering, while military studies at establishments like Picatinny Arsenal informed service rifle considerations. Barrel twist rates, frequently 1:9 or 1:7, were standardized by manufacturers including Barrel Makers' Consortium-style suppliers and influence stabilization of match and heavy-for-caliber bullets used by precision shooters from teams like USAMU.

Ammunition types and loading

Commercial ammunition offerings span full metal jacket, soft-point, hollow-point, polymer-tipped, and match-grade boat-tail projectiles produced by firms including Federal Premium Ammunition, Hornady, Nosler, PMC Ammunition, and Winchester. Handloaders follow published manuals and datasheets from sources like Speer, Lyman, and Hornady to select powders and primers appropriate for case capacity and desired velocity, taking into account pressure specifications from SAAMI and proof requirements in regions under CIP jurisdiction. Specialty loads—reduced recoil, frangible, tracer, and subsonic—serve needs of ranges, training programs at institutions such as Fort Benning, and private companies providing tactical training to entities like Glock-equipped units.

Safety, legal issues, and military use

Safety considerations emphasize adhering to chambering and headspace standards established by SAAMI and CIP, safe handloading practices taught by organizations such as the National Rifle Association of America and state-level shooting clubs, and proper selection of firearms and magazines compliant with regulations in jurisdictions like California, New York (state), and England and Wales where legal frameworks affect civilian ownership. Legal debates over civilian availability and magazine capacity have involved lawmakers in bodies such as the United States Congress and state legislatures, advocacy by groups including the NRA and Brady Campaign, and litigation in courts like the Supreme Court of the United States. Military adoption of closely related 5.56×45mm service cartridges by NATO members, development at institutions like Edgewood Arsenal, and experience in conflicts such as Vietnam War informed doctrine, procurement decisions by defense ministries of countries including United Kingdom and Canada, and subsequent standards harmonized by NATO.

Category:Cartridges