I am getting some pretty big swings in FPS on the various tunes I am trying to dial in. I just want to settle on one slug that shoots beautifully and one tune that I never change. I have tried 130 bar & 3.5 for Javelin 36 and H&N 36 II. I also tried 150 bar and 3.0 ish to get 980-1000. The FX...