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OOPS accidently inflated fps with a 130* F or so valve on MK 177

Started by K.O., November 16, 2014, 04:43:30 AM

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K.O.

I had sat it on an oil filled heater because I thought the pump cup had taken a set...

I did not even think about ideal gas law...

so when I pumped 1600 or so psi of 70* F air into the valve I got about a 160 psi boost

Cold figures are 898 fps with 7.9g CPHP in 22 pumps a 16.75" barrel and some leakage... Still pretty impressive... a 24" barrel would put it back near 1000 FPS...

anyways sorry folks some times ya just don't think...

hey I am not a manufacturer looking for ways to do so... ;)
1322XLT(2100/13XX hybyid)750 fps @ 16 pumps w/CPHP 14.3g

MK1322(2240/13XX/MK177 hybrid) 805 fps at @ 22 pumps w/14.3g CPHP

about 5 more 13xxs
Two Daisy 953(# 31x Jan. 1985) & (Sept 2004)
2100b (with old style piston)
.25 Mrod (50fpe tune)
.177 BSA Buccaneer (on the way)

K.O.

1322XLT(2100/13XX hybyid)750 fps @ 16 pumps w/CPHP 14.3g

MK1322(2240/13XX/MK177 hybrid) 805 fps at @ 22 pumps w/14.3g CPHP

about 5 more 13xxs
Two Daisy 953(# 31x Jan. 1985) & (Sept 2004)
2100b (with old style piston)
.25 Mrod (50fpe tune)
.177 BSA Buccaneer (on the way)