Decided to air up the S200. Tested tank for leaks. Tiny bubble at tank and end piece. New 21 x 2.5 mm from orings and more. Aired up to 2000 psi ~140 bar. Five shot group at 30 yds. JSB Monster Diablo 13.43 gr.
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Well, that certainly could be worse. I’m sure every gun around 400-500 bucks can be that accurate.

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