Gippeto wrote:More than you ever wanted to know about co2;
http://encyclopedia.airliquide.com/ency ... the+values
Check out the vapour pressure graph to get a better idea of pressure in a vessel containing liquid co2 at a given temperature.
Here's one I stumbled across years ago that includes pressure/temp/fill dependencies for CO2 in a tank.
To the paintball folk out there: Yes, HPA or CO2 guns can be equally consistent if you design your system right. I took a POS entry level blow back gun and put a stiff spring in it so that it ran 290 fps at about 350 psi. Look at the above chart and see where 350 psi gets you.... Basically, as long as there was no snow on the ground, that gun was rock solid. Shots were +/- about 4 fps. On an entry-level gun.