As others have offered, for 9mm range pickups are fine.
A really good way to get a stake of empty 9mm brass is just to go to your local indoor range at around 2:30pm (after the lunch crowrd, but before one of the employees sweeps behind the line). A few trips will likely net you all the 9mm cases you can load for a good long time. As posted by others, you will lose your cases before you wear them out.
Good luck, have fun.
When asked what qualities he most valued in his generals, Napoleon said, "give me lucky ones."