223 vs 5.56: What’s the Difference and Which Should You Shoot?
Quick Answer The biggest difference between .223 Remington and 5.56 NATO is chamber pressure. While the cartridges look nearly identical from the outside, 5.56 NATO ammunition is generally loaded to higher pressures and is designed for rifles with a 5.56 NATO chamber. In most cases: For most AR-15 owners, a rifle chambered in 5.56 NATO […]