dimebag1,
As an indication, my FWB300 (Not 'S'), with the one piece spring (from FWB150) makes ca. 656 fps with JSB Match 7.33 gr. pellets. That is a hair over 7 ft.lb.
As the 300 has a longer cocking arm than the 'S', I don't really notice much difference in the cocking effort compared with my 300SU.
Have fun
Best regards
Russ