Have you ever wondered how much barrel length effects muzzle velocity on your rifle? Well I did, so I cut up rifles chambered in 223 Remington, 308 Winchester, 7 mm Remington Magnum and 300 Winchester Magnum to gather empirical data. The purpose of this post is …
via Rifleshooter.com
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches