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Tom West's Custom PC77 PumpMaster Classic Short Rifle



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Chrony speeds and adjustments

June 20 2012 at 9:45 PM

dan house  (Login dan_house)
Crosman Forum Member
from IP address 71.210.114.92

Had it choked down to 395 a few times..... then began to understand how to work it (and no I dont think I could explain it) and managed a few in the mid 600s...... then only filled to 2600

Shot this:

Super H points, 14,2 iirc Throw 1 turn in from all out, Preload 9.25 increase (clockwise i think) 2600 fill

696..4, 714.4, 713.4, 721.0, 735.1, 746.8, 750.9,  2300 end

2300 start 748.2, 750.2, 749.1, 768.7, 759.6, 758.1,  755.9, 749.4 1900 end

1900 start 749.5, 741.9, 739.7, 728.6, 726.1, 717.5, 704.8, 699.1  1400 end

still got that slight peak at the end of the second magazine. need to squish that out to the other end. I was also srpised to see that gross adjsutments had to be made to see a "visible" difference.

 

 



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