power wheel adjustment

New to the Condor world, What is the average fps gain in the power wheel adjustment? I’ve got my Condor SS shooting Cudas at 850 the pw 1-2, adjust it to 1-12 I get the cudas to 945. Does this sound about right? All I’ve done is put an ac oring behind the top hat. Once I did that I cranked the pw to 1-2 then adjusted the top hat a little bit at time till I got the desired fps.