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.357 Magnum by Winchester, *”PROOF”: High Pressure*, One Cartridge not a Box.


One Cartridge , not a box, the picture of the box is for reference only!
For more versions of this caliber please see below in related items.
For more information, please see below.

Please click on the picture for more detail.

In stock

Please Note: Sold as a collectible, do not use in a firearm, it is “HIGH PRESSURE” for testing firearms!

One Cartridge , not a box, the picture of the box is for reference only!

“One Cartridge, not a box”.357 Magnum Proof Cartridge by Winchester.  Nickel plated case with purple dye on the projectile & case base with “WINCHESTER  357” head-stamp.” loaded with a a JSP (Jacketed Soft Point) projectile with a “double charge of powder”,

History of Proof Cartridges:
Proofs are used to verify or “proof” the mechanical strength of a firearm before it leaves the factory, not for use in your firearms!
The bright dark reddish wash or dye on the base (head stamp) and projectile with nickel case is the U.S. industry standard of identifying these types of cartridges.
Proofs are not normally available to the public.

History of 357 Magnum Cartridge:
The .357 Smith & Wesson Magnum, a/k/a .357 Magnum or .357 MAG was developed by Major Douglas Wesson and Philip Sharpe and introduced in 1935 by Smith & Wesson for the heavy-frame revolver.
The cartridge is based on a .38 S&W Special lengthened by 1/10 of an inch, so it would not be chambered in the lower pressure .38 special revolvers. At the time of its introduction, it was the most powerful revolver cartridge until the .44 Remington Magnum was introduced in 1955.
The .357 Magnum was and still is a popular cartridge with law enforcement, hunting and target shooters.


Weight 0.10 lbs

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