Fx bobcat mk2 regulator problem

Hi. I bougth a bobcat mk2 and the regulator pressure are 15-20 bar under cylinder pressure all the time. If i fill the tube to 220 bar the regulator is 200. And when i shot the regulater pressure falls the same as the tube. So if i shot down to 190bar the regulator is 170. I doesent matter how i set the regulator. Anyone who have had the same problem? Its cal.25. Thanks!
 
Hey Alpine Mucho Gracias I kind of suspected and focused the cause on those washers and o rings. I’m glad that you got your bobcat fixed so quick. I live in the Philippines where its a different story I been to some airgun shops and nobody knew nothing about anything. But this forum is just the place to get good information. Now I just need to take apart my gun and hopefully find the right o rings. Thanks really appreaciate your posting.