A system includes a variable choke coupled to a barrel of a shot gun, and a mechanical mechanism coupled to the variable choke and configured to adjust an amount of choke constriction of the variable choke. The system further includes a motor coupled to the mechanical mechanism, and a control system configured to determine a desired size of a shot cone of shot fired from the shot gun, determine a choke constriction position of the variable choke that produces the identified size of the shot cone, and apply control signals to the motor to cause, via movement of the mechanical mechanism, automatic adjustment of the variable choke based on the determined choke constriction position of the variable choke.