I recieved my m60B last year and used it all summer and fall. Stores it in winter and got it out last month to shoir a pesky groundhog on my wife's garden. First shot, the guge was showing full. After a few minutes, shot the pest again and shot a third time to finish him. Last shot felt weak and I looked at the gauge and it was at reg pressure,150bar. Replaced the o ring just below bottle since i cannot detect any leak. Filled it up and it would leak until it reaches regulator pressure and stop leaking. I cannot find the leak with a soapy rag . Looking for recommendations on how to proceed.
Thanks
Gil
Thanks
Gil