I recently noticed a bow in my guitar and that it has been much harder to play than it should be. I tightened the truss rod to bring the string height back down and unfortunately, the string height is still to high for my taste. Tonight I once again looked at the neck and it was still slightly bowed, concaved that is. I turned the truss rod again to tighten and unbelievably, it was as if I couldn't turn it anymore. I used 1/4 turns and always gradual and slow. Since there is still a bow and my action is not where I want it, does there mean something is wrong with my guitar? I don't feel it is stripped or anything and my neck is not bent, twisted, cracked or anything like that. Thank you guys for all your help.
P.S. Guitar is a PRS SE 7-String - no tremelo.