12.5 inch barrel vs 13.7 inch barrel velocity

[RennBaer]

Based on what? I’ve only ever heard a minimal increase and my personal testing has shown that as well.


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Like the person above said, a number of factors can result in a suppressor adding a noticeable amount of velocity to a rifle (if any). In this case, I was basing it on the fact that Strikefirst was reporting a 208 fps increase in average velocity going from 12.5" to 13.9". That's a bigger difference in velocities between those two barrel lengths than I have ever seen, so I was wondering if the suppressor he was using on the 13.9 was possibly contributing to some of that increase in velocity.

Triarc published some velocity data on their barrels a while back that showed around a 100 fps increase in average velocity going from 12.5 to 13.9, so 200+ fps would be a really nice increase in velocity if its due to the barrel length alone.