User's Manual

7) (Optional) If your regulator reached 300 fps before it plateued you could go to
a weaker main spring and re do this procedure in order to have the most
efficient marker. A heavier valve spring would accomplish the same thing.
However, a weaker main spring would lighten your pump stroke. I find the
CCM® main spring is VERY light and I do not adjust my springs.
I have found that 300 PSI is a great place to start with CCM® markers. You
can use a Pressure Testing Gauge or just start low on the Regulator and turn
it up from there. Perhaps even start at 275 psi and make smaller adjustments
to the regulator to get it to plateau at the highest FPS you can.