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CO2 vs. Air on a 2240 platform

Started by Poorman Plinker, August 26, 2015, 05:29:33 PM

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Poorman Plinker

August 26, 2015, 05:29:33 PM Last Edit: October 05, 2015, 11:04:21 PM by Poorman Plinker
 CO2 and LPA comparison .22:
The following are the results of five .22 caliber barrels tested with Low Pressure Air (LPA) and compared to the co2 tests previously done. This was first posted on the Crosman/Poorman Plinker facebook group.


Barrel.....   10.25   12.00   14.50   18.00   24.00
LPA SD...   32.00   34.00   38.00   38.00   22.00
LPA Avg..   512.0   555.0   592.0   618.0   654.0
CO2 Avg..   474.0   491.0   522.0   544.0   551.0
LPA-CO2.   38.00   64.00   70.00   74.00   103.0
LPA Inc /in   00.00   24.57   14.80   7.430   6.000
CO2 Inc/in   00.00   9.720   12.40   6.290   1.170
LPA V/in-
CO2 V/in...   3.710   5.330   4.830   4.110   4.290

8)
The above information is written for entertainment purposes only; it applies only to the arms, equipment  and conditions under which the author's conclusions were drawn and should never be used as a substitute for professional assistance. The author assume no liability for damages (actual, incidental or consequential) resulting from use of the information or for the correctness of the information contained herein. The information is most likely not applicable to your situation and it cannot be generalized to any other equipment or conditions. Use of the information is at the users risk.

arkmaker †

#1
August 29, 2015, 04:22:53 PM
Nice work. So, what kind of shot count were you getting with the LPA and a 10.25" barrel @ 1K fill pressure before it dropped under 450 fps? Those numbers look pretty good for 10M shooting if you could get about 25-30 shots from a fill.
I Am A Natural Mad Air Gunner  -  Full Of Hot Air & Ready To Expel It Quickly!

114 Rifle, 2240XL Pistol, 1861 Shiloh Pistol, 357 Pistols, Titan GP Rifle, PM66 Rifle, 2400KT .177 LW Carbine, CZ T200 Rifle, Benjamin Discovery .177 Rifle, Hammerli 850 Air Magnum in .22

Poorman Plinker

#2
August 30, 2015, 04:00:30 PM
 :( these were from an average of a 3 shot fill to approximate 900 psi and give a velocity drop range (SD). In a short tube like that it would either require a drop block or tethered tank to get any reasonable shot count. I intend to try upping the unregulated pressure, but that will require additional valve modifications. This test was done with factory valve settings.  8)
The above information is written for entertainment purposes only; it applies only to the arms, equipment  and conditions under which the author's conclusions were drawn and should never be used as a substitute for professional assistance. The author assume no liability for damages (actual, incidental or consequential) resulting from use of the information or for the correctness of the information contained herein. The information is most likely not applicable to your situation and it cannot be generalized to any other equipment or conditions. Use of the information is at the users risk.
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