Pulled out my Impact that I haven't shot in 6 mo. Previously shooting fine but now is shooting under 400 fps. Tank is at 230 bar, power setting is 5 just under max, valve is 2 1/2. I do not feel any unusual air when I shoot but it just doesn't have any power. Chrony shows 340 & 380 on max. Shooting .25 cal. but lower results on .30 cal. Suggestions other than sending it to AOA? Regulator pressure 150.