Mirage is the culprit when you have a four shot group that looks like one bullet hole and the fifth shot shows up a half inch away. He's the same guy that directs the bullet to the 8 ring when all the rest are in the x ring. There are a lot of wrong ideas about mirage among the different shooting disciplines.ook at how the spoon handle appears to bend at the point it enters the water. This is an illusion caused by the difference in the index of refraction of air and water. The variation of air temperature between you and the target causes a change in the index of refraction of the air along your sight path.