Regulator drop??

Just got my FX impact back from AOA after my all the repairs it under went. I'm the guy who got the impact with the barrel that was stuck in it had the miss fire issue and the pellets spiraled out of control. Yeah that was me well I got my gun back. I just got home from vacation at midnight. I was very anxious to tear open the box and put my scope on and get her ready for tomorrow morning. So that I did the gun was filled way past 250 bar and the reg was set to about I'd say 160. So the first thing I did was take some shots to get it to 250 bar. Then I put scope on and set up some light to shoot. I shot down to 150 bar then I check the reg pressure and it's dropped down to 110 bar!!!!!!! I went in and filled it up and the reg went back to its original 160 spot. When i originally got my gun the first time the reg was to150 bar. Idk for what purpose they would have messed with reg.What do you think? Obviously AOA will be hearing from me tomorrow but just wanted to let the community know of my situation. Ohh by the way they gave me a new berral and that took care of all my issues but the the miss fire problem idk they never said anything about it but the gun is shooting without any hick ups. Another thing is the rubber bumper on the cocking arm was missing I told them but it's still missing.
 
Since you say the "gun was filled way past 250b", it could be a possibility that the gauge is no longer accurate. The gauge may have been way over, but you actually only have 250b in the gun. Do you have a reliable gauge on your fill assembly?
If so then you need to leave it hooked up (with your air source off) and watch all 3 gauges as you shoot over a chrony. Just fill the gun with a little more air then it takes to get the regulator gauge up to where it stops at it's max point. Then shoot down recording the fps of each shot and the reading on each of the gauges after the shot.

With this you should be able to tell if you have a gauge problem (likely) or if you have a regulator problem.
 
FX gauges on these can be out by 10-20bar!

Regulator would've been set by a specialist digital gauge by AOA, at 140bar. Confirm if that was done.

Bottle gauge showing 150bar and reg gauge showing 110bar ... one of the gauges is paper weight! Both should be showing same readings once air bottle pressure goes below reg set pressure.

These FX gauges are junk, get Wika gauges if you can. Both FX gauges from my impact are in the spares box now.