When the term "sharp shooter" is mentioned everyone in the modern world thinks of a sniper or bullseye shooter. In actuality, the original term is "Sharps shooter."

Sharps was s manufacturer that became famous for producing some of the world's first accurate rifles at a distance. Around the 1850s these rifles were being used by some of the world's best shooters. Due to the great performance such shooters were referred to as "Sharps shooters" because they were using Sharps rifles.

Eventually other rifle manufacturers started to produce rifles that were just as accurate so the term evolved to what it is today: A sharp shooter.