A universal marksmanship training system is disclosed herein configured to utilize a display device comprising a graphic display. A software application may also be provided. The software application is often configured to display a virtual target on the graphic display. A chamber insert may be utilized, the chamber insert configured to be positioned with the firing chamber of a firearm to be zeroed, wherein the chamber insert interacts with the software application to determine alignment of a bore of the firearm to a bore alignment point on the graphic display. In one form, the display device displays a sight target on the graphic display wherein the sight target is visually perceived by a marksman, and is offset from the bore alignment point by a offset distance. In one form, the software application calculates the sight target relative to the bore alignment point of the firearm given a set of condition variables.