Erring on the side of safety, you can always shoot .223 Rem. ammo in a 5.56 NATO chambered rifle, but should only shoot 5.56 NATO ammo in modern, bolt-action .223 Rem. rifles—never in .223 semi ...

The 223 Remington has long been the most popular 0.22-caliber centerfire rifle cartridge, but a newer and faster option called the 224 Valkyrie has been around for a while and is turning heads.

The .223 Remington started as a military cartridge in 1957 — adapted from the .222 Rem. — but has been a popular hunting, sporting, and target cartridge ever since. The 5.56mm NATO cartridge was ...

I was a bit disappointed, though, with chronograph readings from four .223 Rem.-chambered rifles that were 200 to nearly 400 fps slower than the velocities Alliant states for Varmint.

When it comes to the 223 vs 556, it’s not so much about which one is best, but about the differences between them. The 223 Remington and 5.56 NATO cartridges have identical case dimensions but ...

Black Hills manufactures high-quality .223 Remington ammunition. Rifles for the .223 utilize a wide range of rifling twist rates, from 1 twist in 7″ to 1 twist in 12″. Bullets ...

Nearly identical carbines from CMMG, Inc. in 9x19mm and .223 Remington. View Image Gallery The die has long since been cast and the Stoner-based carbine is now the patrol rifle of choice for U.S ...

Two years ago I investigated ammunition shortages in the U.S. At the time many stores and gun ranges were rationing everything from .22 LR to 9mm to .223 Rem. ammunition. The shortage became so ...

There are two popular types of AR-15 calibers: 5.56x45mm NATO and .223 Remington. The sales of modern sports rifles are high these days, and many people are flocking to the AR-15. What exactly ...