Target shooting apparatus

A method and apparatus to provide a weapon operator with information to facilitate correctly adjusting the sights on a weapon. A hit position detector (18, 22) determines where projectiles fired from a weapon pass through a vertical plane in relation to the aiming point. The hit position information is recorded and is utilised in computing (22) the mean point of impact for the group of shots and also in computing the distance from the mean point of impact to the centre of the aiming point. A display (28) indicates either the mean point in terms of distance or may indicate the number of clicks or degrees that the weapon sighting system must be adjusted in order to place the mean point of impact on the aiming point. One embodient determines the validity of a shot group by comparing the smallest circle which will encompass the group of shots and a predetermined circle size and displaying an indication of the validity or validity of the shot group.