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A .480 Ruger and a .475 Linebaugh cartridge
|Place of origin||USA|
|Case type||Semi-rimmed, straight|
|Bullet diameter||.475 in (Script error mm)|
|Neck diameter||.504 in (Script error mm)|
|Base diameter||.504 in (Script error mm)|
|Rim diameter||.540 in (Script error mm)|
|Rim thickness||.065 in (Script error mm)|
|Case length||1.4 in (Script error mm)|
|Overall length||1.77 in (Script error mm)|
|Primer type||Large pistol|
|370 gr (Script error g) SP||1,495 ft/s (Script error m/s)||1,840 ft·lbf (Script error J)|
|440 gr (Script error g) SP||1,360 ft/s (Script error m/s)||1,800 ft·lbf (Script error J)|
| Test barrel length: 5.5"|
Source(s): "Cartridges of the World"
The .475 Linebaugh is an extremely potent rimmed revolver cartridge developed by John Linebaugh in the late 1980s. The cartridge is based on the .45-70 Government case cut down to 1.5 inches and loaded with .475-inch-diameter (Script error mm) bullets weighing from 320 grains (Script error g) to 440 grains (Script error g). Although the .45 Silhouette cartridge is also derived from a .45-70 trimmed down to 1.5 inches, the .475 Linebaugh saw the same case modified to accept .475 caliber bullets, resulting in significantly different ballistic performance.
The then-new .475 Linebaugh was first announced in the May 1988 issue of Guns & Ammo in an article written by Ross Seyfried.
The .475 Linebaugh is primarily intended for hunting big game or as a backup when confronting dangerous animals. A 370-grain (Script error g) bullet starting out at 1,495 feet per second (Script error m/s) develops 1,840 foot-pounds force (Script error J) of energy, and a 440-grain (Script error g) bullet at 1,360 feet per second (Script error m/s) develops 1,800 foot-pounds force (Script error J). In comparison to another popular magnum revolver cartridge, the .454 Casull, the Casull's 300-grain (Script error g) .454 caliber bullet at 1,650 feet per second (Script error m/s) and 1,800 foot-pounds force (Script error J) of energy is surpassed with the Linebaugh's loading of a 370-grain (Script error g) .475 caliber bullet at 1,495 feet per second (Script error m/s) and 1,840 foot-pounds force (Script error J) of energy. Both the .475 Linebaugh and the .454 Casull are ballistically similar and both can also be loaded to higher pressures but the .475 Linebaugh still has an edge on the latter.
As with most large magnum revolver cartridges, the .475 Linebaugh produces a significant amount of muzzle blast and felt recoil to the shooter. In 2003, Ruger introduced a new cartridge called the .480 Ruger, which is essentially a shortened .475 Linebaugh that operates at 4% lower pressure, 48,000 vs. 50,000 for the Linebaugh. This results in a more comfortable shooting experience, with only a minor loss in performance. Just like the .38 special cartridge will chamber and fire in revolvers chambered for the more powerful .357 magnum, the .480 Ruger will chamber and fire in revolvers chambered for the .475 Linebaugh. Although, as the pressures show, the two are much closer in power than the actual "Special" cartridges, vs. their "magnum" counterparts.
- ↑ Script error