Hatsan gauge

I recently bought a used Hatsan Flash Wood in 25 cal. After total reseal, deburring, grinding and polishing off sharp edges, I now have a gun that I can disassemble and reassemble without cutting 'o' rings and a bolt that slides very good. I installed a Huma-Air regulator set at 160 bar and a bi-pod. After testing several different pellets I have found two types that I can shoot 1/2 inch groups at 50 yards, I believe that is good enough for hunting birds an small game. I do have one question I hope someone can answer, after installing the Huma regulator the gauge on the gun will not go to 200 bars is this gauge now regulator pressure or still fill pressure.

Thank You 

Hank