I always tumble my brass after they’ve been fired once in my RCBS tumbler with corn cob media. I than wipe each case off with a paper towel. Is this necessary and is the media an issue on internals of pistol if there’s some still on the cases?

I don't bother to do that. They seem to come out pretty clean.

quote:

Originally posted by maxwayne:
I don't bother to do that. They seem to come out pretty clean.

So no issues with feeding reliable or internal wear?

I use walnut rather than corn cob and have never had issues with the dust. I like it as it acts as a lube in the sizing dies.

Not with corn, walnut can be dusty and I quit using it years ago. I add a bit of liquid car polish for a bright shine.

quote:

Originally posted by iLift45s:

quote:

Originally posted by maxwayne:
I don't bother to do that. They seem to come out pretty clean.

So no issues with feeding reliable or internal wear?

If you are that particular, you should switch to wet tumbling with stainless steel media. It takes a bit more effort, but the result is fantastic.

Wiping that dust residue off is not necessary at all.

Thanks for the insight fellas. Appreciate it! I’m sweating over nothing. It’s actually walnut media too. My bad.

Corncob polishes and Crushed Walnut cleans better.

The only commercial media I would advised against is the Red Stuff Lyman used to sell. That had iron oxide impregnated on the media.

You can get Lizard Litter (crushed walnut) at Wally World or Petco

You can get Corn Cob blasting media 14/20 grit at McMaster Carr or Graingers.

To keep dust down save used dryer sheets and throw them each time you polish brass it helps keep some of the dust down.

I too have changed over to wet tumbling mostly but still like the walnut for my rifle sets. It seems to get anything major off of the case more readily. I do wipe them down but I think that is a bit different than the 9mm handgun batches you were speaking about.

I also use corncob media. And I throw a tablespoon 50/50 mixture of NuFinish and mineral spirits.

Corn cob, with crushed walnut shells in a Hornady tumbler . Afterward I de-cap and clean the primer pockets.