.41 Rem. Mag. Ladedaten

The .41 Remington Magnum, also known as .41 Magnum or 10.4×33mmR (as it is known in unofficial metric designation), 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.

Development
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 as early as 1955 Keith had suggested a new, medium-powered ".41 Special" cartridge, this idea was passed over in favor of the higher-powered "Magnum" option, and the Special survives only as a custom wildcat cartridge, bearing roughly the same relation to the .41 Magnum as the .38 Special does to the .357 Magnum and as the .44 Special does to the .44 Magnum.

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 manufacturers' 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 Magnum were considered too large, bulky, and heavy for police to carry.