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

[iamthelazerviking]

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?

[Ecapnation]

No....

Your sprung to hard and your pressure is too low.

Start by retuning the lower tube and resetting your hpr outputs

[Chuck E Ducky]

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

[iamthelazerviking]

I was going to say, not sure how accurate the gauge really is...

[iamthelazerviking]

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?

[FrankW]

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

[iamthelazerviking]

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.

[latches109]

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?

[latches109]

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]

Yes, all stock lowers

[latches109]

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