WE M14 inner barrel question

[Sim123456]

Hi guys, with the stock lenght (540mm) on a RA-Tech 6.03 I'm hitting 536fps. But when I switch to DeepFire 705mm 6.02 inner barrel, I'm at 485fps. Both use the same hop up set-up. So why I'm loosing power with the 705mm vs 540mm? Thanks guys!

[Amos]

Because the gun isn't outputting enough propellant for the extra 165mm's of barrel

[Sim123456]

Ok, good answer thanks!

[snipersyntagmatik]

Originally Posted by Amos

Because the gun isn't outputting enough propellant for the extra 165mm's of barrel

hey Amos, what exactly is the threshold in barrel length in which FPS would start increase versus decrease if mechbox particulars were to remain constant, ie, a M16 platform ... how long an inner barrel could one replace and expect max FPS?

[Sim123456]

Finally I tried my CQC EBR inner barrel and this is my best inner barrel, stock WE 6.025, 551fps with .02g at 20C. Wonder why...