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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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If we're picturing the same thing

August 13 2012 at 9:23 PM
Chris  (Login Hudson12tum)
Crosman Forum Member
from IP address 24.212.153.167


Response to I don't think so

then the spring could only make second stage pumping harder. Here's what I think we're talking about.

[IMG][linked image][/IMG]

So the spring preload takes the place of the ball detents, and once the 1st-stage piston bottoms out the spring begins to compress and the second-stage piston keeps moving. The problem is that the spring can only increase the force needed to compress the second stage, and there's no way to get the energy back.


    
This message has been edited by Hudson12tum from IP address 24.212.153.167 on Aug 13, 2012 9:24 PM


 
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