I’m about 115b on mine to shoot jsb monsters 13.4gr at 820-830 or 835-845 depending of the chronograph and getting 52 shots in 10-12fps with amazing accuracy out of the short barrel (41cm). Those number jump to 890 if I use the longer barrel but I prefer the short one. I use to have it at 90b and it gave me 120 shots at 820 with 10.34
Im finding 120 bar is working just fine. 45 good shots with JSB 10.4s. Havent gotten to the chronograph yet, more concerned with accuracy and reliability at the moment.
What brand barrel did you go with?after market cylinder also looks good.I own two tk's .177 and .20 cal,detuned the .177 to 12ft lb's and kept the .20 cal a tad under 20ftlb's for field target both just as accurate as my neighbors steyr's.