223 Ammo

223 Ammo, The .223 Remington (pronounced “two-twenty-three”) is a rimless,

bottlenecked, centerfire intermediate cartridge, as defined by SAAMI [4] and

C.I.P. [5]. It was developed in 1957 as part of a project to create a small-caliber,

high-velocity firearm for the U.S. Continental Army Command. The cartridge

was a collaborative effort between Remington Arms and Fairchild Industries.

Today, the .223 Remington is one of the most widely used cartridges, employed in a

variety of semi-automatic and manual-action rifles.

History 223 Ammo

Firstly, The .223 Remington, 5.56×45mm NATO, and .222 Remington (from left to right in

comparison) share a common lineage. The development of the .223 Remington

was closely tied to the creation of a lightweight combat rifle, which ultimately

became the iconic AR-15 platform. The cartridge and rifle were a collaborative

effort involving Remington Arms, Fairchild Industries, and additional engineering

advancements that shaped the modern intermediate cartridge concept.

In 1964, Remington submitted specifications for the .223 Remington cartridge to

SAAMI. Using DuPont IMR powder, the initial pressure was rated at 52,000 psi.

Later, with the adoption of Olin Ball powder, the pressure increased to 55,000 psi

(379 MPa). [8] 223 ammo​

Also, The U.S. Army officially designated the .223 Remington as the 5.56×45mm Ball,

M193. However, there are key differences between the two cartridges. If a

5.56×45mm NATO cartridge is loaded into a chamber designed specifically for .223

Remington, it can make contact with the rifling, creating a tighter forcing cone.

This results in significantly higher pressures than what .223 Remington chambers

are designed to handle. [3]

For the 5.56×45mm NATO chambering, NATO standardized a rifling twist rate of

178 mm (1 in 7 inches). This twist rate was selected to stabilize the longer and

heavier SS109/M855 ball cartridge, which requires a higher twist rate for optimal

performance. 223 ammo​

Impact of Barrel Length on Velocity .223 ammo

The muzzle velocity of a cartridge is significantly influenced by barrel length. In

general, a shorter barrel results in a lower muzzle velocity, while a longer barrel

allows for higher velocity. The original AR-15 rifles featured a 20-inch barrel,

which served as the standard for the .223 Remington and 5.56×45mm NATO

cartridges.

Furthermore, For the .223 Remington (M193), muzzle velocity changes approximately 25.7 feet

per second (7.8 meters per second) for every inch of barrel length gained or lost.

The 5.56×45mm NATO (M855) experiences a slightly greater change, with velocity

varying by about 30.3 feet per second (9.2 meters per second) per inch of barrel

length. [18] 223 ammo​

bulk 223 ammo

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Lasly, Commercial Offerings and Usage 223 bulk ammo

One of the most widely used cartridges today, the .223 Remington, is available in a

variety of firearms, including semi-automatic, manual-action rifles, and

handguns. It is popular across civilian, military, and law enforcement applications

for its versatility, accuracy, and manageable recoil.

(Visual comparison: From left to right – .243 Win, .308 Win, .223 Rem)

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