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Old 11-13-2012, 12:56 AM #1
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Noobie questions

1. Since a lot of markers operate around 100 psi, will the marker stop firing when the tank reads 100 or will it stop at a larger number than that?

2. Overboring vs underboring. Overboring works for everything right?? Do you just sacrifice small amounts of accuracy?
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Old 11-13-2012, 01:19 AM #2
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A lot of marker's do not operate at 100psi..

Most are around 200-300psi, once your tank pressure gets low enough it won't just up and stop on a dime, the velocity will slowly start dropping then when pressure is low enough it will eventually stop firing the paint out the barrel. Depending on the tank reg, will depend on when this starts happening.

Overboring to a certain amount will work for just about everything. Wouldn't go more then .03-.07 larger then the balls, and no more then 0.05 smaller when underboring.
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Old 11-13-2012, 01:26 AM #3
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Operating pressure really depends on the marker and the bolt design. For example, on a spyder/tippmann, the gun will stop firing when there isn't enough pressure to recock the bolt. Before this happens though, the shots will probably decrease in velocity even though the gun may still recock. Tank pressure is really only good for estimating how much air is left until pressure starts to get inconsistent.

Overbore is generally less efficient while underbore may be more efficient although harder on cheap paint. Accuracy is determined by the ball shape. It's not something you really can control other than paint choice.
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Old 11-14-2012, 11:41 AM #4
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Basically the gun just starts to shoot slower and slower until the balls go like 10"
Operating pressure vary a lot, so there no real solid answer

Underbore if you play pump, and bore to match when playing semi. Over boring decreases efficiency.
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Old 11-14-2012, 11:50 AM #5
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Everyone basically covered it, but not all markers operate at 100 psi. I have meet few that run best there, mostly Macdev I believe. Others prefer between 180-310.
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Old 11-14-2012, 09:29 PM #6
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Originally Posted by Fedo View Post
Everyone basically covered it, but not all markers operate at 100 psi. I have meet few that run best there, mostly Macdev I believe. Others prefer between 180-310.
Yeah your right about MacDev. My Clone runs at exactly 100psi.
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Old 11-15-2012, 12:08 AM #7
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Okay, your PSI question:
CO2 and HPA Tanks output 800psi across the board unless they're set for something different (like the Ninja Pro Series or preset Crossfires). Now, most lower end markers will operate directly off of this pressure (Spyders, Tippmanns, Piranhas, etc...) and work just fine. They'll be more efficient at a lower pressure, however. This is achieved by the use of a regulator, which steps the pressure down from anywhere to 400psi to 50psi or less, depending on the reg! Now, these regulators seem to like to sit somewhere around 300psi. My Superstock runs 350, my A5 runs 300, so it's a nice tight number. So, at 800psi left in the tank, it starts to decrease velocity and consistency.

I'd rather underbore, but that's just my inner 'Cocker owner coming out. Underbore will give you better shots, depending on the degree of underbore. Obviously you don't want to use a .670 for paintballs .687 in diameter...that'll not go well for you.
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