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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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molecule squeezer Attn: Rob

May 23 2012 at 7:40 AM
Ron  (Login oo7fuzz)
Crosman Forum Member
from IP address 65.29.187.27

Keep in mind that the only thing that don't work is a dead horse.
[linked image]

 
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robny
(Login robnewyork)
Crosman Forum Member
69.127.160.231

this is a Must See diagram guys..heres my question, with such small volume in the

May 23 2012, 8:38 AM 

Conservative area why not ( umm just remembered )..digress ..that 100 psi would only precharge the valve first pump..useless after that..im just trying to think aside from the compression stroke, where else could the addional air be used effectively.

[linked image]
"i never was much for book learnin"

 
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Ron
(Login oo7fuzz)
Crosman Forum Member
65.29.187.27

Don't worry about the extra air which escapes

May 23 2012, 9:01 AM 

that only means the compressor is running at idle and not compressing air while opening and closing the handle. Narry enough to significantly drain the battery. Better to let the air escape than to rig/install troublesome switching to conserve that modest amount of air.

My experimenting with a 5/8 X 8" sweep pump is that the supercharging to ~70psi happens very quickly. Which is, IMHO, a welcome pause between strokes.

 
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