Barrel Length and Bullet Velocity
This video empirically demonstrates the significant impact of barrel length on bullet velocity for 5.56x45mm NATO ammunition. Testing AR-15 platforms with barrel lengths of 7.5, 11.5, and 14.5 inches, followed by a 20-inch bullpup, shows a clear trend of increasing velocity with longer barrels. The data highlights how barrel length is a critical factor in achieving optimal ballistic performance.









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