Reply To: Air arms s500 bell curve
The best starting fill pressure for the S500 series is around 190 bar. If you shoot full string you will starting at 200 bar you will see a dip, then a rise, then a dip again. Starting from 180-190 you should only see 1 rise and 1 fail. I have and S510 .22 FAC and i get the best result starting at 190 bar (2755 psi). I can get 4 clips. I believe the issue with the original drop is the hammer spring trying to over come the pressure put on it from the air tube.