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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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P rod numbers

June 16 2012 at 11:09 PM

dan house  (Login dan_house)
Crosman Forum Member
from IP address 71.210.114.92

Just with installed HDD and the .101 TP, no other mods or adjustments

Fill Shot Speed
2500 1
2
3 758.4
4 762.6
5 762.9
6
7
2100 8
2100 1 764.2
2
3 763.3
4 760
5 757.6
6
7
1900 8
1900 1 755
2 752.7
3 740.6
4 727.7
5 723.9
6 709.6
7 700.3
1100 8 689.9

First thing one notices is the increase in speed. Second thing is the fall off in the last mag.

Another round shows similar results but a liattle more speed

Fill Shot Speed
2500 1 699
2 716.4
3 747.6
4 756.5
5
6 774.2
7 775.3
2200 8
2200 1 772.6
2 783
3 785.9
4 781.1
5 782.7
6 779.1
7 775.8
1900 8 773.6
1 756
2 760.3
3
4 745.4
5 740.3
6 731.9
7 719.8
1400 8

The of course its off the 3k fill

40 shots, but youll see the valve lock in the first few shots

Fill Shot Speed
3000 1 550.5
2 598.6
3 603.8
4 617.5
5 623.1
6 634.5
7 647.1
2800 8 646.4
2800 1 642
2 661.2
3 672.2
4 681.2
5 687.6
6 694.2
7 708.9
2500 8 719.7
2500 1 703.1
2 718.7
3 736.7
4 751.9
5 750.3
6 758
7 759.5
2200 8 768.6
2200 1 759.3
2 774.2
3 777.2
4 774.3
5 769.2
6 762.6
7 758.1
1800 8 750.6
1800 1 744.8
2 741.3
3
4 719.2
5 706.1
6
7
1400 8

 

Soooo based on all this, I think 24 shots in the 725-750 is possible. I think some tuning will yield that.....



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This message has been edited by dan_house from IP address 71.210.114.92 on Jun 16, 2012 11:11 PM


 
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