Tuning Airmaks Regulator

I would start at 1/4 turn. I have messed with the regulator on my Katran a lot and started at 1 turn out. Was shooting over 50 fpe but very inconsistent. Kept working my way in until I was at about 1/4 turn out. Now shots very consistent at 40 to 43 fpe depending on pellet weight.

Thanks I’ll start at 1/4 turn. I’m looking for around 40fpe.