JT 4.0 low velocity

[VerySolidSnake]

hey guys my velocity in my 4.0 is pretty low. I keep screwing in the adjuster in the back, but i'm afraid i might break the o-ring thats holding it. Should i just keep tightning it as hard as possible??

[Icefire]

There is a second main spring that comes with the JT. The second one should be the cold weather spring which will increase the volicity by a bit. Try that first. If not, go get a new spring from the pro shop. Also, have you open up the flow regulator on the ASA yet? If not, open it by a full turn or so.

[MyJTRox]

Yes, that other spring makes a big difference.