Tank, are those cases nickel plated? I have reloaded nickel plated cases without a problem for .40 S&W. I have some Win Supreme brass in 7mm-08, although, I can't remember if I have ever reloaded any. I suggest that you measure the brass prior to sizing and then remeasure after sizing. This may give you some indication on how soft the brass is. I believe that Winchester uses only premium components and have always trusted that manufacture. H.J.