Blog

Understanding the Differences Between 5.56 NATO and .223 Remington Chamber Checkers In the world of firearms and ammunition, precision and safety are non-negotiable. A frequent point of confusion among shooters is why a 5.56 NATO chamber checker can be used for both 5.56 NATO and .223 Remington cartridges, while a .223 Remington chamber checker is only suitable for .223 Remington. To address this, we must explore the technical differences between these two cartridges and their respec …