primer residue is more likely to be present than lead

There won't be much lead residue in fired brass. The powder and primer residue is more likely to be present than lead. I'd say most of your dust comes from the media itself. You sould avoid breathing the dust but it's likely less toxic than walking in the dowtown core of a large city and breathing the smog.
When you begin tumbling add a dryer sheet like bounce to the walnut or whatever media, rip it into four or six pieces and put it in with the media, it will pick up most of the dust.
When you begin tumbling add a dryer sheet like bounce to the walnut or whatever media, rip it into four or six pieces and put it in with the media, it will pick up most of the dust.
Primer is lead styphnate. primer residue is mostly lead.![]()
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And this is where ignorance can actually hurt you.
Primer residue IS lead salts which are the most dangerous form of lead because they are absorbed more readily into tissues.
As to the OP. the amount of lead you may or may not have inhaled is irrelevant because there is not a thing you can do about it now. Just learn from your mistake and don't do that again.
I have my lead levels checked during my yearly physical, nothing has changed in over over 25 years of heavy shooting and lots of tumbler dust and reloading probably in excess of a hundred thousand rounds. Always wash my hands and try to avoid exposure as much as I can.



























