.41 Magnum
| .41 Remington Magnum | ||||||||||||||||||||
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| Type | Revolver | |||||||||||||||||||
| Place of origin |
 United States
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| Production history | ||||||||||||||||||||
| Designer | Elmer Keith / Bill Jordan | |||||||||||||||||||
| Designed | 1964 | |||||||||||||||||||
| Manufacturer | Remington Arms | |||||||||||||||||||
| Specifications | ||||||||||||||||||||
| Case type | Rimmed, straight | |||||||||||||||||||
| Bullet diameter | .410 in (10.4 mm) | |||||||||||||||||||
| Neck diameter | .434 in (11.0 mm) | |||||||||||||||||||
| Base diameter | .434 in (11.0 mm) | |||||||||||||||||||
| Rim diameter | .492 in (12.5 mm) | |||||||||||||||||||
| Rim thickness | .060 in (1.5 mm) | |||||||||||||||||||
| Case length | 1.290 in (32.8 mm) | |||||||||||||||||||
| Overall length | 1.590 in (40.4 mm) | |||||||||||||||||||
| Rifling twist | 1-18½ in | |||||||||||||||||||
| Primer type | Large pistol | |||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||
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| Test barrel length: 6.5" Revolver | ||||||||||||||||||||
The .41 Remington Magnum is a center fire firearms cartridge primarily developed for use in large-frame revolvers, introduced in 1964 by the Remington Arms Company, intended for hunting and law enforcement purposes.
In 1963, Elmer Keith and Bill Jordan, with some help from Skeeter Skelton, petitioned Smith & Wesson, Remington, and Norma to produce a pistol and ammunition in .41 caliber which would fall between the extant .357 Magnum and .44 Magnum cartridges in ballistic performance, and at the same time address perceived shortcomings with those loads. While Keith had suggested a softer .41 Special cartridge as early as 1955, this idea was passed over in favor of the Magnum option, and the Special survives only as a custom wildcat cartridge.
The .357 Magnum suffered from restricted terminal ballistic effectiveness in the early 1960s, as jacketed hollow point bullets were not yet commonly available, and the manufacturer's standard loadings consisted of simple lead bullets. The powerful .44 Magnum, primarily a heavy hunting round, was considered overkill for police use, generating too much recoil for control under rapid fire. In addition, the revolvers chambered for the .44 were considered too large, bulky, and heavy for police carry.
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