Key Points - A gun expert with over three decades of experience identifies five contenders for the world's most powerful handguns. -These include the Smith & Wesson SW500 revolver in .500 S&W Magnum, ...

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The great cowboy and gun writer Elmer Keith had a hand in the development of the 357 Magnum. To make it, Smith & Wesson lengthened the 38 Special cartridge and upped the pressure form 17,000 psi to 35 ...