Reply To: Finally figured out velocity loss

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mrjohns
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It is a .22 and shot pretty good until recently.  It might need honing but, I would not know what I was doing, so shaving a little off the piston seal is something I am able to do myself. If I screw-up the seal it wont cost much to replace it. If I screw-up the compression tube it would be around 60 dollars. What is bothering me is the velocity spread is about 24FPS. It use to be about 6FPS. The barrel bore is not a problem. Before the first piston seal went bad, the TX would shoot under 1/2″ at fifty yards. I bought the seal from James Macarri, but he can’t know if my compression tube is under sized or not. I don’t think Air Arms  made all their compression tubes on the TX200 , the same size on the inside diameter.