Switch to HPA tank - low velocity - Paintball Forum - Paintball guns and gear forums
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Old April 20th, 2013, 04:04 PM   #1 (permalink)
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Switch to HPA tank - low velocity

I bought a basic A5 with a flatline barrel about 3 years ago, played with CO2 about two dozen times. No problems.

The Hydrotest date was up on my CO2 tank so I purchased an Empire 48 cu 3000 psi HPA tank. First time using the marker, I couldn't chronograph above ~220, even after 2-3 complete CCW turns of the velocity screw.

I filled the tank the first time, the field staff ensured it was filled, adjusted the velocity screw, re-chronoed and concluded that it was "good enough".

Field limit is 285, I think I should be about 260-270 for best performance of my flatline.

Is 225 fps really "good enough"? Any troubleshooting ideas?
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Old April 20th, 2013, 04:11 PM   #2 (permalink)
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What's the output pressure of the regulator on the tank? you may need a stiffer main spring if you have a high pressure output regulator already.

255 is what some indoor fields use, but they're also smaller in size than outdoor places. I prefer to be shooting 275 at the lowest.
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Old April 20th, 2013, 04:21 PM   #3 (permalink)
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Thanks for the quick response.

Empire's website lists a tank output pressure of 800 psi. I do not have any other reg. I guess this means I need a new spring.

Is it likely replacing the drive spring with another OEM drive spring will actually increase velocity? This assumes the original spring has lost stiffness in the 3 years since I bought it.

Last edited by TacoMan : April 20th, 2013 at 05:02 PM.
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Old April 21st, 2013, 07:37 AM   #4 (permalink)
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Could be three things
Reg not outputting enough pressure
Main spring in the gun weak
Hole location in Asa to far over.

If the reg does not output enough you will not get the velocity, try it on another gun to find out or use another tank on your gun.

Main spring in the gun but if the co2 worked ok then this should not be the issue

The hols in the Asa sometimes is to far over to the side. Screw in your system the way and back it out a1/8 to 1/4 turn to allow the air to flow correctly

Most likely the reg is not enough output.
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Old April 21st, 2013, 08:30 AM   #5 (permalink)
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oo, I like the tank pin/asa combo problem. it make more since.
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