Ammunition for seriously powerful air guns. Have you really got a powerful weapon? Then Exact Heavy is the right choice. Heavy. Stable. Accurate. It is being appraised for its low sensitivity for weather and windy conditions. Muzzle velocity is 215 m/s if the power of airgun is set to 16J. 13.73 gr with a head diameter of 5.51mm. Domed. 500 pellet count per tin.