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Alan Alford's build

2250b Tube for later move to bulk CO2.
12" .22 Caliber Barrel from Doomsday Backpacker
Brian & Assoc. Alluminum Breech with 2 barrel screws
Original site rear
Pin site on Custom Mt. Airguns Muzzle Break
2x1 Centerpoint Scope with UTG dovetail adapters
Mountain Airguns Custom Bolt and Handle
Mountain Airguns Custom Power Adapter and spring guide
B&A Boss Valve for extra Power

Built mainly for fun and to shoot at local Field Trial Pistol Match.

It currently it shoots a 14.3 Crosman Hunting Pellet at about 530 fps in a 72 degree room for 8.92 FPE.



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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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