223 Rem. as a dedicated service rifle cartridge by FN about 20 years later. Today, it’s common to see rifles chambered for both, especially AR-15 variants. And it is equally common to see ammunition ...

In 1962 Remington submitted the cartridge to SAAMI (Sporting Arms and Ammunition Institute) for approval, and a year later the company introduced their first 223 Remington rifle. Interestingly ...

223 Rem., usable with a wide range of readily available ammunition, and broadening the appeal of the already very popular rifle. The new Precision Rifle employs a hybrid "Target" chamber ...

The first deals with pressure. Manufacturers load .223 Rem. to 55,000 psi, as established by SAAMI (Sporting Arms & Ammunition Institute). The maximum average pressure for the 5.56 NATO is about ...

223 are generally more accurate than the .308. With a variety of rifles and ammunition, Freel has recorded 258 5-shot groups that averaged 1.923 inches for .308 and 573 5-shot groups that averaged ...

223 Rem. Tyler Freel Lots of 5.56 NATO ammunition is commercially available, and as a universal solution to the discrepancy between 5.56 and .223 chambers, several rifle manufacturers began ...