In 9mm I often used Winchester "White Box" FMJs from Walmart.
Federal FMJs have been cheaper so I also have picked up some of them.
Bought a box of RWS a while back and tried it out. Good ammo but more expensive than U.S. brands.
In .45 ACP, .38 Special, .357 and .41 Magnum I mostly use my reloads, almost always made with locally-cast lead bullets.