[2] Linebaugh was then known for converting six-shot .45 Colt revolvers to five-shot configuration, which allowed the use of higher-pressure ammunition than would be safe in many existing firearms chambered for the cartridge.

While this venture was a success, Linebaugh was intrigued by Wheeler and Topping's work, and decided to pursue a .50 caliber handgun cartridge of his own.

Prior to January 2019, the only alternative was to have a gunsmith such as John Linebaugh of Linebaugh Custom Six guns or Hamilton Bowen of Bowen Classic Arms convert pre-existing revolvers such as the Ruger Blackhawk and Bisley to fire the cartridge.

[4] This particular loading generates 1,650 ft⋅lbf (2,240 J) of energy making this one of the most powerful handgun cartridges put into production.

However, the .500 Linebaugh provides a larger diameter, heavier bullet with a greater sectional density than the .454 Casull.