I received my adapter to fill my Ranger XR yesterday. Filled the gun and shot it twice, just to see how well the moderator worked. Noticed today that it was quite a bit under the full line on the guage. Thinking I didn't quite get it full, I went back to the scuba tank and filled it to the top of the green on the guage. It was down 20 bar immediately after. This is my first PCP with a probe type fill. Suggestions?