What might make a .45 Texan lose about 100fps and up its air usage? My brother’s .45 Texan is having this problem. Contrary to what the very nice lady at Airforce told me, it is not the power wheel settings or the way we clean the barrel. We’ve had this gun for a year and a half and are very familiar with how to tune it for different weight projectiles. It is one of 5 Airforce guns we own between the two of us. The gun is totally stock except for the addition of an R&L shroud. Any breech orings or valve/tophat factors I need to be looking at? Are there known issues with hammer spring fatigue?