[citation needed] Co-founder Dick Casull had been experimenting with several prototype revolver cartridges since 1956.

Casull felt he could offer a more powerful version of the .45 Colt and .44 Remington Magnum and built a number of five-shot prototypes on Ruger Super Blackhawk frames.

[7] At least two variants of the Model 83 with a three-inch barrel and lacking an ejector were produced in .454 Casull and .44 Magnum.

Six-shot revolvers produced with .22 Long Rifle sporting- and match-grade cylinders available, as well as .22 Winchester Rimfire Magnum from 2003.

[10] The .224-32 FA is a wildcat cartridge designed and produced in 2009 by Freedom Arms for use in their Model 97 revolver.

The .224-32 FA was designed to provide a high-performance .22 caliber centerfire cartridge that would work in a revolver, and is capable of taking varmints and predators up to the size of coyotes.