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 photo 63f5b325-0274-4312-9dbd-2effde5b3715_zps0x27orls.jpg

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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Quit picking on Crosman

December 14 2011 at 2:21 PM
Ron  (Login oo7fuzz)
Crosman Forum Member
from IP address 24.167.225.137


Response to Yup. Cuz' what holds the checkvalve open isn't the pressure...

They design for longevity rather than efficiency.

Your light spring is a good mod but the heavy spring and the force it exerts to the sealing process stands a better chance against particles of debris which so often collect across the seal surface in question. Where the first pumpstroke might otherwise fail to seal completly should the spring be of minimal force.

 
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