Posted on: 2011-05-25 06:57:00 -0400

I came across a helpful experiment while searching for how barrel length affects the muzzle velocity of .308 match ammunition. The author started with a 24" barrel and chronographed Federal Gold Medal Match 168 gr. while cutting down the barrel in 2" increments. Quoting from the article:

  1. 24" barrel average velocity 2696 FPS
  2. 22" barrel average velocity 2663 FPS
  3. 20" barrel average velocity 2621 FPS
  4. 18" barrel average velocity 2566 FPS
  5. 16" barrel average velocity 2524 FPS

Velocity drops off slowly from 24” to 20” and them more rapidly down to 16”.