Chinese Airgun Forum: You've got some low velocity

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You've got some low velocity July 21 2012 at 4:54 PM		Carlos in ATx (Login crgintx) YFOT
Response to Low bux tuning fun, TS-45

Mine shoots about 670-680 with JSB 4.52's. Probably a bad seal somewhere. If you haven't torn down the gun yet and bushed the transfer port down to .125", it's worth the effort for the much smoother firing cycle. While you're at it, the replace the crap Chinese spring with a TX-200 spring from Maccari. If you're really feeling froggy, you can whittle up a piston head and used the TX-200 piston seal. It fits the TS-45 Chamber.

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Responses

All apart to lap the compression tube, but never thought to change the TP - cal on Jul 23, 2012, 10:57 AM

Brass or Steel Shim - Carlos in ATx on Jul 24, 2012, 5:51 AM

Turned up a transfer port reducer from steel - Cal on Jul 25, 2012, 10:52 PM

My transfer ports - Carlos in ATx on Jul 27, 2012, 7:26 PM

I just put a slug of steel round stock on a mandrel to serve as a lap - Cal on Jul 28, 2012, 12:10 AM

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