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Tom West's Custom PC77 PumpMaster Classic Short Rifle

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700 fps is going to require valve work I think

January 22 2011 at 4:30 PM
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Response to 1377 flat top setup questions

With the flat top valve and piston and lighter valve spring I was able to get about 630 fps on 14 pumps.....700 fps will probably require some kind of valve work like Phil suggested.

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