This video breaks down the key differences between .223 Remington and 5.56mm NATO ammunition, focusing on pressure, chamber specifications, and interchangeability. It explains that 5.56mm NATO is loaded to higher pressures and has different chamber dimensions to safely accommodate this, while .223 Remington is a lower-pressure civilian round. The video also introduces the .223 Wylde chamber as a hybrid design that can safely fire both types of ammunition, commonly found in AR-15 style rifles.
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