F&S.
In 1955, Smith & Wesson and Remington teamed up to introduce the .44 Remington Magnum, and gun writer Elmer Keith was a great inspiration in the cartridge’s development. The .44 Magnum’s starring role in Clint Eastwood’s Dirty Harry movie gave it immediate credibility and fame. It is, however, a handful to shoot, which is why it’s common to find used .44 Magnum revolvers being sold that come with a half box of ammo. Many shooters find they’re just not quite the man Inspector Harry Callahan was. Fortunately, .44 Magnum revolvers can also safely chamber and fire .44 Special ammunition, which has much less offensive recoil. In factory ammunition, there are more than 50 .44 Magnum loads to choose from, and about half as many .44 Special loads.
The 44 Magnum does not use a 0.44-caliber bullet. The bullet diameter is actually 0.429-inch in diameter, but, 429 or 430 Magnum just does not have the same ring to it. The cartridge is loaded to a maximum average pressure of 36,000 psi, which is about twice that of the .44 Special. As powerful as that seems, the .357 SIG is actually loaded to a higher pressure. The .44 Magnum has been used to successfully take every game animal on earth, and it’s a personal protection favorite with those who like to tromp around in big bear country. Marlin and several other manufacturers currently offer lever guns chambered for the .44 Magnum.
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The .454 Casull was not approved by the Sporting Arms and Ammunition Manufacturers Institute (SAAMI) until 1997, and their standard specifies a maximum average pressure of 65,000 psi. This is absurdly more than the .44 Magnum, and it’s where the .454 Casull finds all its power. The cartridge can push a 200-grain bullet to more than 2000 fps. By comparison, the .45 Colt is only loaded to a maximum average pressure of 14,000 psi. In a 50-ounce revolver, .454 Casull is intimidating to shoot with full-power loads, recoiling with around 36 foot-pounds of hand-numbing and wrist-twisting force. Rossi and Big Horn Armory both offer lever-action rifles chambered for the .454 Casull.
If power is your main consideration, there’s no comparison; the .454 Casull is the clear winner. With its most powerful loads, the .454 Casull can generate nearly 2,000 foot-pounds of kinetic energy at the muzzle. This puts it in the same class as some popular rifle cartridges, but with bullets weighing twice as much. However, with high performance +P+ ammunition, the .44 Magnum is not that far behind the .454. Take note, however, there is not a SAAMI standard for +P or +P+ .44 Magnum ammo. Dirty Harry’s cartridge will not shoot quite as fast or hit as hard as the .454 Casull, but like the .454 Casull, the .44 magnum is capable of handling any critter you want to tackle.
I find shooting a .44 magnum wheel gun quite enough, and after a couple of wheels of ammunition I’m ready to put it away. I shoot it enough to know what to expect. The power is great for the bush, but I don’t think I want to sport a .454 Casull handgun.
However, I would surely have a lever action rifle in 454 Casull, except that Big Horn Armory charges an arm and a leg for their rifles. I know Rossi makes a rifle, but it surely doesn’t have the looks of a quality gun. Henry doesn’t make one in that caliber either.
Ruger has several revolvers in 454 Casull but their choice is certainly limited. That the selections in 454 Casull are so limited seems to me to limit the use and popularity of the cartridge.