some people think that federal bought out Blazer, but as mentioned ATK owns them and blazer. Wal-mart SG employees just have stated to me, they're now pulling supplies from federal in addition to blazer. Whatever factory gets it made first is where they'll pull supplies from. Blazer Brass is fully reloadable. Federal Champion brand is the equal to that of the blazer brass.
It would be interesting to see if since Federal now distributes 5.7x28mm if they'll start selling it at Wal-mart..