Switch to HPA tank - low velocity
I bought a basic A5 with a flatline barrel about 3 years ago, played with CO2 about two dozen times. No problems.
The Hydrotest date was up on my CO2 tank so I purchased an Empire 48 cu 3000 psi HPA tank. First time using the marker, I couldn't chronograph above ~220, even after 2-3 complete CCW turns of the velocity screw.
I filled the tank the first time, the field staff ensured it was filled, adjusted the velocity screw, re-chronoed and concluded that it was "good enough".
Field limit is 285, I think I should be about 260-270 for best performance of my flatline.
Is 225 fps really "good enough"? Any troubleshooting ideas?