The dust contains water and acid soluble lead compounds (the forms that actually can be poisonous). One of the members had a friend with lead testing equipment who found the only part of his reloading room that had lead contamination was around the vibratory tumbler. Not even his casting area had a significant problem compared to the tumbler dust.
If you have no kids in the house, that's probably not a big issue, but if you wash it and get the toxic part into solution you want to be careful how you handle it. In particular keep it away from children and food preparation surfaces and equipment.
One of the good features of the wet tumbling is the citric acid used by most folks cleaning this way is a chelating agent, so it can bind the lead in reactive forms into non-toxic molecules. I don't know what degree of effectiveness it has at that function, but it can't hurt.
If you have no kids in the house, that's probably not a big issue, but if you wash it and get the toxic part into solution you want to be careful how you handle it. In particular keep it away from children and food preparation surfaces and equipment.
One of the good features of the wet tumbling is the citric acid used by most folks cleaning this way is a chelating agent, so it can bind the lead in reactive forms into non-toxic molecules. I don't know what degree of effectiveness it has at that function, but it can't hurt.