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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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Sometimes it pays not to know....

June 13 2012 at 10:48 AM
rsterne  (Login rsterne)
from IP address 66.244.241.34


Response to An old discussion of the 12gm-Horsepower-second.

that something can't be done.... A while back I posted on the CAF about the theoretical 1649 fps velocity limit for expanding room temperature air.... After a LOT of discussion, one of the members took a Condor filled to 2700 psi (air, not Helium), pried the sabot from a .22 cal RWS Hyper Velocity Pellet and blasted the 1.4 gr. piece of plastic through his Chronograph at 1734 fps.... When asked for a repeat, he videotaped it and got two more shots of 1680 and 1701....http://www.youtube.com/watch?v=2jxT8y8-9j8

Bob


    
This message has been edited by rsterne from IP address 66.244.241.34 on Jun 13, 2012 10:51 AM


 
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