.41 Remington Magnum - Wikipedia
https://en.wikipedia.org/wiki/.41_Remington_Magnum
WEBThe .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.
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