The objective of the shot-put action is to throw a 7.26 kg ball as far as possible, while following the rules that govern the event. The range of the shot is determined by its conditions at release, e.g., the velocity, height, horizontal distance (distance in front or behind the circle), and angle of release. Changes in the velocity of release will affect the distance thrown more than equal changes in either the angle or height of release (Gregor, McCoy, & Whiting, 1990; Hay, 1985).
NTCA Throwers Handbook
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Maheras, A. (2008). Determining the Optimum Angle of Release in the Shot-Put Event. NTCA Throwers Handbook, J.A. Peterson & Lasorsa R. editors, p.p. 127-131.