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.223 Rem. (5.56 x 45 NATO)
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Caliber Specifications:
Caliber: | .223 Rem. (5.56 x 45 NATO) |
Standard / Datasheet: | C.I.P. |
Bullet Diameter: | 0.224" | 5.69mm |
Primer Size: | Small Rifle (SR) |
Max. Case Length: | 1.759" | 44.68mm |
Max. Cartridge Length / OAL: | 2.260" | 57.40mm |
Max. Standardized Pressure: | 62366 psi | 4300 bar |
Case Capacity: | 28.8 Grains of Water | 1.87 cm3 |
CID: | CID_134 |
Last updated: | 2/20/2025 |
- The .223 Remington (also known as 5.56x45mm NATO) cartridge is a popular rifle round that was developed by Remington Arms in 1964. It has an overall length of 2.26" and is a rimless, bottle-necked case measuring 1.76" long with a bullet weight ranging from 30 to 77 grains. It fires at pressures up to 55,000 PSI and produces more energy than other popular calibers like 7.62x39mm and 6.5 Grendel.Originally designed for the US Military, the .223 Remington is used in many semi-automatic rifles for civilian applications such as self-defense, target shooting and hunting. Its accuracy and light recoil make it ideal for sport shooting competitions, while its excellent terminal ballistics make it suitable for hunting game ranging from varmints to medium game animals.
Weight vs. Velocity - Suitable Bullets for this Caliber
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Barrel Length Variation vs. Velocity - by Bullet Weight
.223 Rem. (5.56 x 45 NATO) load data available with the following bullets:
(most popular first)
Filter by Bullet Weight (Grains)
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