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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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I think your experiment shows the air in the headspace contributes to power

January 17 2011 at 9:58 AM
Glover, Walter  (Login Voltar1)
Crosman Forum Member
from IP address 72.25.192.4


Response to Hi Walter, the piston extending after the shot (does) add power,

but inconclusive WRT flex of the system adding power.
In that 2004 the change in piston length will likely be in the order of 0.010" so doubt it is the source of power you lost.
Cool example of the idea if your idea is correct though happy.gif

Walter....

 
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