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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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Not to quibble, but the Disco's screws are actually #8-32.

February 11 2012 at 12:50 PM

Steve in NC  (Login pneuguy)
Troll, Banned User or Assorted Delinquent
from IP address 74.242.252.49


Response to If you had one of these, it would be easy to win the bet stop

Their ultimate tensile (shear is of course less) strength is probably about 800# each for a total for the three of ~2400#, meaning the valve might be expected to let go and become a projectile at about 5500 to 6000psi.

That gives a safety factor of ~2.8 for the Disco's rated 2000psi MWP fill. Just about right, IMHO.

Steve


    
This message has been edited by pneuguy from IP address 74.242.252.49 on Feb 11, 2012 12:54 PM


 
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