white ammo refers to Winchester, it comes in a very particular white box. It is the cheapest, very dirty. It is very common in the states, not so common here but common, specially in 9mm.
For a couple dollars more you can shoot Blazer Brass and keep the brass, which is good brass.
Bottom line, the best ammo is the ammo you make. Reloading for 9mm is very easy, fool proof and you will always have ammo in hand. I end up loading 45 min before going to the range, load 200 rounds and go shooting.
That way you don't have to worry about buying ammo.
Cheers.