Winchester WSSM. (2003 New Products Gallery).Winchester Ammunition introduces two new cartridges, the .223 Winchester Super Short Magnum Winchester Super Short Magnum, or WSSM is a line of cartridges introduced by the U.S. Repeating Arms Company (Winchester Inc). It is a further development of the Winchester Short Magnum concept utilizing smaller bullets, but still of a high velocity. (WSSM WSSM Winchester Super Short Magnums (ammunition)
WSSM Weapon System Support Manager
WSSM Weapon System Staff Manager ) and the .243 Winchester Super Short Magnum. The .223 WSSM is available with a 55grain Ballistic Silvertip in the Supreme line, and the 55-grain Pointed Soft Point and 64-grain Power-Point in the Super-X line. The .243 WSSM is initially available with the 55-grain Ballistic Silvertip and 95-grain Ballistic Silvertip in the Supreme line, and the 100-grain PowerPoint in the Super-X line.