The . 25 WSSM was added to the family in 2004 .
In 2003 the first cartridges of this design , the . 223 and . 243 Winchester Super Short Magnums ( WSSM ) , were introduced .
The . 25 Winchester Super Short Magnums was added to the family in 2004 .
In 2003 the first cartridges of this design , the . 223 and . 243 Winchester Super Short Magnums ( WSSM ) , were introduced .