Airgun with predetermined selectable impact energy with temperature compensation

An airgun, comprising:

• a temperature sensor configured to provide a temperature value indicative of an ambient temperature;
• an adjustable air mass system configured to provide an adjustable amount of pressurized air as a function of an energy level;
• a trigger system configured to release the adjustable amount of pressurized air from the adjustable airmass system in response to receiving input from the user such that a projectile is launched from the airgun in response to the input from the user;
• and
• a controller comprising a computer readable storage media storing a ballistics value, wherein the controller is configured to:
• determine the energy level as a function of the ballistics value in the computer readable storage media and the temperature value such that when the projectile is launched by the airgun, the projectile reaches the target with a predetermined amount of impact energy;
• and
• provide the determined energy level to the adjustable air mass system.