For 9mm when I don't reload, Federal Champion Brass or Aluminum.
Have bought and shot a lot of Federal Lake City in 5.56 M855 , M193, and 7.62 NATO. Good Stuff!
Non-USA made, but good
For 7.62x39mm Russian, I've bought and shot a lot of Wolf, Tula, and Silver Bear. Prefer Wolf and Silver Bear.
Have also bought some Australian Surplus 5.56 M855 and no complaints so far.