From the beginning, rifle and pistol shooting was all about hitting the target as close to center as possible, as many times as possible within the maximum allowable shots. In shotgun events, shooters try to break all the moving clay targets that are thrown into the air. Those are the basics, and the basics haven't changed.
Mostly, what has changed is the equipment used and the clothing worn, along with the participation of women and the appearance of airguns on the Olympic shooting scene. Rules have changed and will likely continue to do so as time goes by.
