 The .480 Ruger is built on the same frame as the .454 Casull, and was introduced as a six-shot model.While the .480 Ruger is not loaded to the rifle-like pressures of the .454 Casull, the bigger (.475 caliber, 12 mm) bore allows the use of heavier bullets than the .454 Casull, making it a good choice for handgun hunting.The .480 Ruger operates at far lower pressures than the .454 Casull, making it more comfortable to shoot.