Unless it has been damaged and scored, it would be best to leave it alone. Weihrauch do a fine job at the factory, no benefit will come of re-honing the cylinder. If you are having piston tightness issues, try sizing the piston seal. This can be done by spinning it and touching it with very fine abrasive paper. Get a V-Mach, Bonny & Clyde or Maccari tuning kit if you wish to finesse the performance of this truly excellent rifle. Be careful though as it is easy to put miles over the legal power limit.Originally Posted by joffy
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