First time poster, great site!. I have a HW100, which has just developed a strange problem. When filling through the quick fill probe, once the bottle fills to around 150 bar, it starts venting from inside the rifle. I take it up to 200 it vents back down to +/-150, then holds steady. This is not a slow leak, you can hear it and it drops to 150 bar in a few seconds. Rifle is a full power model, I bought in SA. I live Angola.
Thanks for any help.