The Georgia 300 is a privately owned railroad car owned by John H. "Jack" Heard of Florida. It has been used by several recent presidents for various campaign related Whistle Stop Tours.

A private railroad car, private railway coach, private car, or private varnish is a railroad passenger car either originally built or later converted for service as a business car for private individuals. A private car could be added to the make-up of a train or pulled by a private locomotive, providing privacy for its passengers. They were used by railroad officials and dignitaries as business cars, and wealthy people for travel and entertainment, especially in the United States. They were sometimes used by politicians in "whistle stop campaigns". Pay cars with less opulent sleeping and dining facilities were used by a paymaster and assistants to transport and disburse cash wages to railway employees in remote locations without banking facilities.