.480 Ruger

The .475 is a wildcat cartridge made by cutting a .45-70 case to a length of 1.4 inches (36 mm), and necking it to accept a .475 bullet.

Rather than using the Blackhawk, Ruger chose to chamber the new round in the double-action Super Redhawk, and designed the cartridge to fit in a 6-shot cylinder.

The .480's large diameter rim is also turned down, which is required to fit the 6 cartridges in the Super Redhawk's cylinder without interference.

Depending on load, the .480 Ruger can easily reach within 150 ft/s (46 m/s) of the .475 Linebaugh, making it a very formidable hunting cartridge for large and dangerous game.

The standard .44 Magnum powders, in similar amounts, will push a 400-grain (26 g) bullet at over 1300 ft/s (thus yielding a TKO factor around 35.28 vs. 34.62 for a 325 gr 454 Casull at 1,650 ft/s (500 m/s)).

This provides 1,500 ft⋅lbf (2,000 J) of muzzle energy, about 50% more than commercial .44 Magnum loads, showing the .480 Ruger's good efficiency with the heavy bullets.

[citation needed] Handloaders reported getting phenomenal performance out of the round, rubbing shoulders with the .475 Linebaugh and easily equaling and even eclipsing the Taylor Knockout Value (TKO) of the .454 Casull, with less recoil, muzzle blast and noise due to the .480's lower pressures.

This did not occur until August 2015, when a Bisley Super Blackhawk model in .454 Casull and .480 Ruger, was announced as a distributor exclusive through Lipsey's.