Noticed the other day that accuracy was a bit off, and pressure was dropping quicker than usual, refilled and left it over night,next day i went to the range and went to fire and just got a fart....... the gun was empty, anyway at home i noticed that the pressure gauge was a little loose, so thought that it sorted.

Meanwhile i set to making a shroud, finished that and tightened up the gauge, filled it up and when to use it a couple of hours later only to find that it had dropped from 220 bar to 100 bar, i have dunked the fill valve and end of barrel in a jug of water and can seen no evidence of leaks, both cocked and un-cocked, so its looking like its somewhere in the breech or internal ports, any ideas? is it just a case of a strip down and try replacing some O rings...re lube and hope for the best? or has anyone got any tips for finding leaks?