Why 556 Rules the World
This video details the historical development and global adoption of the 5.56x45mm NATO caliber. It covers the initial military requirements for a lighter, higher-velocity round to replace the 7.62x51mm, focusing on weight savings, flat trajectory, accuracy, and incapacitation. The evolution from .223 Remington and the distinction between the two calibers are explained, along with NATO's standardization and the subsequent advancements in projectile technology to address effectiveness concerns.













