Having a strange HPR issue I can't seem to figure out. When I try to decrease the amount of pressure going into my gun by backing out the adjustment screw, it only seems to happen to about ~175 PSI, even if I completely back out the set screw until its loose. The gun still fires even without the adjustment screw at all ( right around that 160-180 pressure range)
Is it the piston that is getting stuck or something else? I tried taking off all the lube on the piston oring and placing just a smidge back on with no affect.
Edit: It is also REALLY stiff when trying to screw in my adjustment screw, I am not sure if this is relevant to the above issue but it sounds like it