The present invention provides a sight adjuster for a velocity measurement system for sighting a projectile. A velocity measurement unit has a front sensor area and a back sensor area, and the sight adjuster has a front panel with a sighting bore such that the front panel is for positioning in the front sensor area of the velocity measurement unit, and the sight adjuster has a back panel for positioning in the back sensor area of the velocity measurement unit, and a light projects through the front panel sighting bore to strike the back panel.