I was doing some research on the net trying to decide what length to make my 6.5 Creedmoor barrel and came upon these reports. Interesting real world results showing velocities as a barrel is shortened inch by inch.
6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor! | Rifleshooter.com
308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28″ to 16.5″) | Rifleshooter.com
Short and Loud: The 16 inch 308 Win Precision Rifle | Rifleshooter.com
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