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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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HiPAC suggestions welcome

January 20 2011 at 5:39 AM

Ian Taylor  (Login tayloriand)
Crosman Forum Member
from IP address 80.193.86.34


Response to Still more to be had

Hi Tony,
I'm also trying to set up my 1740 HiPac.
My last visit to the clubs chrono produced similar results.
I'll post my string when I get home but it did have a spread of around 100fps returning up to 30 shots with a fill of 120bar.
I need to do a test like Roberts great post on how fps spread effects accuracy.
I'd like to know how to flatten the curve and open to suggestions. I could try fill pressures and have a spare hammer/striker that I can get reduced.

I live in the UK with a 6fpe max gun law. I'm looking for a maximum number of consistent 5fpe shots.
Cheers
Ian

 
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