CO2

Just as its name implies, CO2 air rifles are powered by CO2. The one unique thing about this type of air rifle is that power and capacity are affected by temperature.

When kept at room temperature, a typical cartridge will yield 900-1000psi, which is pretty consistent. However, if the temperature rises or drops, the point of impact can change dramatically.

Temperature changes can be a problem, but professional shooters arrive hours early to allow their cartridge to adjust to the ambient temperature.