Winchester had something to do with bismuth when Peterson had it but that didn't last long. I remember some of the earlier boxes of it I had showed the Winchester logo and were loaded into Winchester cases.
Really the only one of the "Big Three" that ever did anything serious with a double gun friendly non-toxic shot was Federal and their Tungsten Polymer shells which are now discontinuned.
The vintage gun shooting segment of the market is just too small to warrant the trouble I'd imagine. They make their money selling steel and the various hevi-shot variants to all the Benelli / Berreta automatic shooting crowd.
Destry
