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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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sealing diameter determines area, spring determines force

December 14 2011 at 4:29 PM
Glover, Walter  (Login Voltar1)
Crosman Forum Member
from IP address 72.25.192.4


Response to sooooo, all the force needed to overwhelm the spring

so if you apply 5#s force to a 5/16" inlet check the cracking force will be 65 psid

if that force is 20 #s force of course the pressure is 261 psid ( pounds per sq inch differential)

 
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