So I've reloaded pistol rounds for years. Bought a 223 and shot it for the first time today. Of course I picked up the empties.

Do people tumble them? Does the cleaning media get into those tiny necks?

I always pick up my brass and clean it, but I don't plan to reload 223 soon. Just save it for a rainy day.

What I do with pistol brass is 1) wash with soapy water, 2) rinse, 3) let it dry, 4) deburr, 5) tumble 6) bag for later

I do this for the stuff I reload (32, 38, 357, 44, 45) and also for 380 and 9 MM, though I've yet to reload any of those. That way all the brass in my house is "ready to go."