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The .454 Casull was finally commercialized in 1997, when SAAMI published its first standards for the cartridge. [6] [7] [8] The new Casull round uses a small rifle primer rather than a pistol primer, because it develops extremely high chamber pressures of over 50,000 CUP (copper units of pressure) (410 MPa), which are rifle levels of pressure ...
Although not originally designed for handguns, several rifle and shotgun cartridges have also been chambered in a number of large handguns, primarily in revolvers like the Phelps Heritage revolver, Century Arms revolver, Thompson/Centre Contender break-open pistol, Magnum Research BFR, and the Pfeifer Zeliska revolvers.
The .460 S&W round is a lengthened, more powerful version of the popular .454 Casull, itself a longer and more powerful version of the .45 Colt.For this reason, the .460 S&W Magnum can be considered an example of a "super magnum".
.454 Casull. This magnum revolver cartridge, a lengthened .45 Colt , was developed by Dick Casull and Jack Fulmer in 1957 as a high-powered big game hunting round. For many years, the small Wyoming manufacturer Freedom Arms was the only substantial maker of guns for the cartridge.
The .45 BPM uses the .460 S&W Magnum brass casing as its container. The .460 S&W Magnum was derived from the .454 Casull while the .454 Casull was derived from the .45 Colt. Because of this lineage the .460 S&W Magnum has similar dimensional attributes to the .45 Colt with the exception of a much longer casing.
Dick Casull with a rifle. Richard J. Casull (/ k ə ˈ s uː l /) (February 15, 1931 – May 6, 2018) [1] was an American gunsmith and wildcat cartridge developer whose experiments with .45 Colt ammunition in the 1950s led to the creation of the .454 Casull cartridge.
Any .454 Casull revolver will chamber and fire the .45 Colt and the .45 Schofield, but not the inverse due to the Casull's longer case. The .460 S&W Magnum is a longer version of the .454 Casull cartridge. Likewise, .460 Magnum revolvers can chamber and fire the three shorter cartridges, but again, not the reverse.
The expensive individual brass cases can be reused after replacing the primer, gunpowder and projectile. Handloading reuse is an advantage for rifles using obsolete or hard-to-find centerfire cartridges such as the 6.5×54mm Mannlicher–Schönauer, or larger calibers such as the .458 Lott, for which ammunition can be expensive.