Did I tune my P-ROD for maximum power?

So I followed a tutorial to tune my PROD. I'm going for maximum power without replacing anything. Right now I have base fill of 2500 PSI and I can get 2 magazines in before it drops to 1800 PSI. My settings are

Hammer Spring Preload Adjustment: 7 turns (CW) from full (CCW)
Hammer Throw Adjustment: 1 turn (CW) from full (CCW)

I'm using 21.12gn beeman kodiak copper plated, I'm trying to reach 20 FPE and I can't tell if I have since I don't have a chrony just yet. I'm just wondering if the settings I tuned it to is the maximum you can increase the power to.