What is the difference between CO2 and N2?
Check the Interactive Image. One of the major noticeable differences is the lack for the need of an expansion chamber on your airgun or bottle. The CO2 is bound by the Ideal gas law. A quick drop in the pressure of the tank, from shooting your airgun fast, will drop the temperature in the bottle to a point where only liquid CO2 is processed into the expansion chamber. (Or maybe you just poured liquid into your expansion chamber by holding the bottle upside down — this is known as gravity.) Eventually the expansion chamber, if you have one, will be filled with liquid. Well this first causes an increased amount of CO2, in the form of liquid, to flow into the gun. As this liquid expands behind the ball it has more pressure than normal. In most airguns this will cause the ball to go out of the airgun more than 20 fps faster than usual, in other guns it may cause lock up or even damage.
