Reply To: Air arms s500 bell curve

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Ginuwine1969
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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.