Tuning Help please.

What kind of valve do you have and what fpe do you get?

If you can't exceed about 30 fpe then you may need a hi-flow valve and a heavier hammer (maybe spring, too). There used to be a huge amount of tuning info on the old "yellow" forum, they had a sub-forum just for Airforce guns.

You can get parts from Asian suppliers pretty cheaply now - but you should try get a ligit airforce valve.

I have an old Condor (or Talon, I can't recall) - originally it was only shooting at about 850 fps with 18 grains, and the power wheel at max. With a heavier hammer I could shoot with higher PSI in the tank but it still wasn't much more powerful. With a hi-flow valve I can easily get over 1,100 fps if I turn up the power wheel.