It's been a year or two since my last post.
This is my first time to encounter the issue.
I have an FX Impact (600mm .25cal with with Power Plenum Kit (old one). Shooting JSB Heavy 33.9gr. 113 PSI Regulator pressure with 225 psi Cylinder pressure.
Whenever I open the Hammer Spring Adjuster way above the 4th line, the FPS goes down to at least 10 FPS. When I close the hammer spring adjuster mid/3rd line, the FPS goes up to 10psi. But if I close it more near the 2nd line, the psi goes down by 20 psi.
I wonder what causes it and how to correct it. I want the fps to go up when ever I open the Hammer Spring adjuster and for the fps to go down when I close it.
Once again, thank you.
This is my first time to encounter the issue.
I have an FX Impact (600mm .25cal with with Power Plenum Kit (old one). Shooting JSB Heavy 33.9gr. 113 PSI Regulator pressure with 225 psi Cylinder pressure.
Whenever I open the Hammer Spring Adjuster way above the 4th line, the FPS goes down to at least 10 FPS. When I close the hammer spring adjuster mid/3rd line, the FPS goes up to 10psi. But if I close it more near the 2nd line, the psi goes down by 20 psi.
I wonder what causes it and how to correct it. I want the fps to go up when ever I open the Hammer Spring adjuster and for the fps to go down when I close it.
Once again, thank you.
Last edited: