Reply To: Good tuning results?

Forums PCP Airguns Good tuning results? Reply To: Good tuning results?

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mcdonama
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“John_in_Ma”How much ai does the tube hold, 190cc, 200cc, 150cc? My S500 has a 231cc tube and will give me 170 shots on reg from 3000-1500psi with a bit tighter spread and deviation. If course i did extensive hammer lightening, played with a half dozen hammer springs as well as different size shims for the valve spring. Oh and the huma reg is set for 110bar.


John,

i think the tube is 122cc.  It’s pretty small– one reason I chose the external Huma design.

Yes, Huma said the reg came set at 110.  Mine seems to come off reg a bit lower but of course it could be the accuracy of the tiny gage is out a bit.