[mongo007]

When you run CO2 at a cold temp you should still be fine as even at Freezing temp 0C (32F) CO2 still has a pressure around 475 psi. That is before the regulator, so if your regulator is set to 150 psi and your CO2 is at 475 psi it should have no problem maintaining the 150 psi output. Unless you are firing at an insane rate like 8 bb's a second insane.

If you are getting liquid CO2 past your regulator then that is where you are having problems. If there is Liquid CO2 in your line and it starts to expand that is the time where you could possibility start shooting very hot. As it can expand up to its highest pressure depending on temp ( 850 psi @ 21c[75F], 475 psi @ 0C[32F] ). But your regulator will prevent liquid CO2 from entering into your lines or gun so your good on that point.

 

[mongo007]

I dont know how you only get 3 mags with a 13 ci hpa tank. with a paintball gun shooting at 250 psi you get an average of 10 shots per ci so 130 shots on a 13 ci tank. And im sure a paintball gun uses more volume of air to push the ball out then and airgun uses to push a bb out. So im not sure whats up with your set up you might want to have a look at it and check for leaks or see if you are wasting air with every shot.

You can get 60 to 80 shots on those little 12g CO2 cartridges. Maybe even more if you fine tune your gun. I know i read something out there about 2 different shooting styles when using a rig. One is High pressure Low volume and the other is Low pressure High volume.

 

[mongo007]

Yes CO2 will leave a residue but you should be doing regular cleaning on your gun with HPA or CO2. Which will take care of the CO2 residue.

the one True main advantage to using CO2 is the ability to use the 12g cartridges. Because of their small size you can make a rig that will fit in a rifle butt stock pocket like this one http://www.sportsmanswarehouse.com/...tridge-Holders-andPouches/prod70713/cat100061