Low Pressure Xvalve operation w/ G-force Frame

[ironchef97]

Hi, I recently got a G-Force frame, and attached it to my mag. Anyways, I was previously using a Pneu'd Chimera Frame, which when I attached a DXS 68/4500 LP tank to, only the pneumatics would cycle, the bolt would remain stationary and not move forward to release air. So I intended to just see how the trigger/pneumatics felt on the G-force frame, without having the problem of noise from dry firing, HOWEVER, upon installing the G-force frame, the gun CONSISTENTLY fires, yet the output is only like 450psi. I don't know what is going on, I thought Xvalves (which is what I'm using) needed at least 7-800psi to cycle fully. The only thing I can think of is that the tank is actually not a LP tank, but I doubt that, as when the Chimera Frame was installed, the gun would not fire, but when I switched to a HP tank, it would. I also bought this tank as part of a package with a G7 Fly which operate fine together, which makes me believe that it's a LP tank (plus the guy who sold it to me said it was LP).

So in summary:
Chimera Frame w/ DXS LP Tank (450 psi): pneumatics cycle, but Xvalve does not fire.
Chimera Frame w/ Ninja HP Tank (850 psi): Gun fires consistently

G-force Frame w/ DXS LP Tank: Gun fires consistently
G-Force Frame w/ Ninja HP Tank: Gun fires consistently

Angel G7 Fly w/ DXS LP Tank: Gun fires consistently
Angel G7 Fly w/ Ninja HP Tank: Gun explodes (jk I didn't actually air the Angel with an HP tank)

I am also using a WGP Tickler LPR.
Any thoughts as to why this is happening?

[ElPanda]

only thing I can think of off the top of my head is the large increase in leverage against the sear arm that the g force frame has over the chimera