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Tom West's Custom PC77 PumpMaster Classic Short Rifle

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FPS with valve mods

January 17 2011 at 6:09 PM

Kevin  (Login firmink)
Crosman Forum Member
from IP address

Response to 1377 flat top setup questions

With the mods mentioned here, I get an average of 581 fps with 13 pumps on my 1322. Everything you do to your gun will factor in the final fps, from valve to barrel length.

1322 w/14" .22 cal barrel, custom valve, brass piston: (~581 fps)
[IMG][linked image][/IMG]


1325 w/22" .25 cal barrel, full hot rod valve mod, brass piston, and power adjuster: (~565 fps)
[IMG][linked image][/IMG]

Have fun!

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