M3 Impact Reg.

Couldn’t help myself so just got back from shooting FPS back down to 770. More adjusting count not get above, so unscrewed Hp bottle bleed PSI off all regs. And plenum reattached HP bottle everything back as was, BUT VELOCITY!
What I did notice was plenum not recharging ( swoosh sound…) all the PSI was from 1st reg. 150bar to 140bar and back to 150bar with each pull of trigger? No plenum SWOOSH!