Winchester Short & Super Short Magnums
Nickel Plated Cases
Brass Cases
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. Now it seems to
be back in stock and other ammunition producers are also making the ammunition