[Rolns]

60 degrees outside, but tippmann 98c got 300 shots, my brothers spyder xtra got bout 300, and my other brothers JT gun got like 400. We all just filled up at dicks right before we played. Is this way to low or has it just been a long time since I've played with CO2?

[gamer565]

How big are your tanks?

[Rolns]

O, sorry that info would help lol, 20 ounce

[7paintball]

that is an interesting one.. maybe they were not filled up all the way? The weather could be a factor too.

[gamer565]

Originally Posted by 7paintball

that is an interesting one.. maybe they were not filled up all the way? The weather could be a factor too.

Gonna go with the first part.

There's no telling if the guy who filled your tank did it correctly or to the correct amount.

[2nwyka]

My friend regularly gets 300-400 shots a fill on his Tippmann A5...Usually it's the weather. It doesn't take much of a temperature differential to screw the tanks up. It's odd, because I can get maybe 600-700 shots on my Triton with a 9oz, and I get about the same from a 62/3000...odd...I would suggest trying to shoot when it's warm and see how it works then.
Noah

[haynboy8223]

It all depends on the gun and if the guys at Dicks sporting goods filled it to the max. That's why I always fill my tanks at a paintball store for optimal amount of air.

One other thing the weather out side could also be a cause of this. Good luck.

[Milky Spore]

there's a certain trick to filling a co2 tank properly. the guy at the dicks sporting goods store probably doesn't know jack **** about how to fill a tank either and is doing it wrong. i'd go to a paintball shop if you have one near you. if not, maybe request a new fill station tech be put in place of the old guy.

[Paper_Cut]

Originally Posted by haynboy8223

It all depends on the gun and if the guys at Dicks sporting goods filled it to the max. That's why I always fill my tanks at a paintball store for optimal amount of air.

One other thing the weather out side could also be a cause of this. Good luck.

Originally Posted by Milky Spore

there's a certain trick to filling a co2 tank properly. the guy at the dicks sporting goods store probably doesn't know jack **** about how to fill a tank either and is doing it wrong. i'd go to a paintball shop if you have one near you. if not, maybe request a new fill station tech be put in place of the old guy.

CO2 is gauged via weight, if it wasn't all the way full, it wouldn't weigh 20oz provided the person recalibrated the scale to account for the empty bottle.

However, what most likely happened:

CO2, when going from a liquid to a gas, is an endothermic reaction, or it requires heat. In a perfect world, expanding CO2 will put out about 800psi if it gets enough heat. However, in 60* weather after 300-400 shots, the tank will be so cold and the outside won't be hot enough to heat it fast enough, will result in two things:
1. the output pressure would lower more and more until it dropped below the threshold that the tippman and spyder needs to properly cycle.
2. It would be putting out a lot of liquid which wouldn't expand until it got enough heat to fuel that reaction.

The CO2 will expand at a force of ~800psi max, so the gun will shoot at the same speed(assuming it was chrono'd at 800psi) even though it is pouring useless liquid out of the barrel(useless in the fact that it isn't being used to actually fire the paintball). It will also be operating the gun below ~400-600psi needed to actually fully cycle a blowback.
Combine that with the 16 year old not fully filling the CO2 because he forgot to press "tare" on the scale then and I think that is the series of reasons why you only got 300 shots from a 20oz.

[azhector]

Depends how much liquid you cycled, how filled, reg (gun and tank) fps on your gun, barrel (if bored), bolt, and a few others I'm too lazy to type xD

[pbcustom98]

for me, if I don't go to a paintball field or store, its not filled properly.

[haynboy8223]

Originally Posted by Paper_Cut

CO2 is gauged via weight, if it wasn't all the way full, it wouldn't weigh 20oz provided the person recalibrated the scale to account for the empty bottle.

Thank you for telling me something I already know!!!

pbcustom98 for me, if I don't go to a paintball field or store, its not filled properly.

Yes the same thing happens to me.

[azhector]

the only field by me that fills co2 only fills it like 1/2 way, when i used to use it i would always go to like dicks and they would fill it 90% of the way

[Rolns]

I used dicks, I just feel like we should have definitely gotten more shots out of that. 300 shots in over 60 degree weather with a 98c with no upgrades that effect that seems a bit low.