.300 WSM by Winchester, Brass Case, JSP, 1 Cartridge not a Box!
For more information, please see below.
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One Cartridge, Not a Box: .300 Winchester Short Magnum (300 WSM) produced by Winchester using new Brass Cases, with a “ WINCHESTER 300 WSM” Head-Stamp and a 180 grain PP Power Point or JSP (Jacketed Soft Point) projectile.
History of the .300 Winchester Short Magnum Cartridge:
The .300 Winchester Short Magnum Cartridge or .300 WSM (for short) was one of the 7 WSSM & WSM cartridges introduce in the early 2000’s (app. 2003).Winchester came out with the 7 new cartridges known as the WSSM(Winchester Super Short Magnum) in .223″, .243″ and .25″ calibers, and the WSM (Winchester Short Magnums) in 7mm, .270″ ,.300″ and .325″
Basically, they took the idea from the Lazzeroni Company with a slightly steeper shoulder angle.
Winchester also produced the rifles in all 7 calibers, then a few years down the road stopped making the ammunition to the dismay of all the rifle owners.
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