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Low air in tank = venting down barrel? (sniper/cocker)

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    Low air in tank = venting down barrel? (sniper/cocker)

    I can't recall the last time I shot a tank down to near empty on a sniper. With this SS-25, it doesn't leak when cocked. Pull the trigger and it endlessly vents down the barrel. Gauge read about 1k psi then of course went lower after venting a couple times. Thought I was running into other issues but maybe it's low air?

    Is this typical?
    Feedback 3.0

    Originally posted by SignOfZeta;
    Us beardos with wallets need to occasionally make our voices heard.

    #2
    No....

    Your sprung to hard and your pressure is too low.

    Start by retuning the lower tube and resetting your hpr outputs

    Comment


      #3
      Those tank gages are terribly inaccurate. Sure it still had 1k in it. Shoot them completely empty it can vent.

      Comment


      • iamthelazerviking
        iamthelazerviking commented
        Editing a comment
        I was going to say, not sure how accurate the gauge really is...

      • iamthelazerviking
        iamthelazerviking commented
        Editing a comment
        Let's say the tank actually had a bit less than the gauge reads and it's almost empty. Venting normal in that case then?

      #4
      If you cock it again after your shot, does it stop venting? How far is your IVG in?
      Feedback

      Comment


      • iamthelazerviking
        iamthelazerviking commented
        Editing a comment
        Yes anytime the hammer is cocker back, no venting. Only when pulling the trigger. IVG is about 2 turns.

        I need to just go get my tank filled and test this out again.

      #5


      Hammer spring > (valve spring + HPR psi on surface area of the valve face)

      you want <

      Do you have a stock ccm 11/16 lower tube?

      Comment


      • latches109

        latches109

        commented
        Editing a comment
        so if you had a main spring that was exerting 2lbs of force more than the valve spring, you would need 215psi across 6 sq.mm to achieve equilibrium - this is a very simplified example - ignoring hammer weight, friction, pressure spikes etc..

      • iamthelazerviking
        iamthelazerviking commented
        Editing a comment
        Yes, all stock lowers

      • latches109

        latches109

        commented
        Editing a comment
        do you have a HPR tester to set the pressure and test the recharge?
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