One Cartridge, Not a Box: .223 Winchester Super Short Magnum (223 WSSM) produced by Winchester using new Brass Cases, with a “ WINCHESTER 223 WSSM” Head-Stamp and a 64 grain PowerPoint or JSP (Jacketed Soft Point) projectile.
History of the .223 Winchester Super Short Magnum Cartridge:
The .223 Winchester Super Short Magnum Cartridge or .223 WSSM (for short) was one of the 3 WSSM & 4 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, Winchester took the idea from the Lazzeroni Company with a slightly steeper shoulder angle.
