Not to light off another anxiety for you (the OP), but you probably absorb more airborne lead in a single indoor range session than you do in a year's worth of reloading.

And whatever you do, don't take up bullet casting!

Which is not at all to make light of a very serious problem. Lead exposure can be deadly.

Alas, we now live in a world inundated with anxious worry. Everything is a threat. And there's a compulsion to protect ourselves - or have the government do it for us - from anything that might hurt you.

Empirical evidence would suggest that with a bit of common sense, shooting and reloading - and tumbling brass - is perfectly safe. You can bring your tumbler back inside.

The bad news is you're going to die. The good news is that it isn't going to be because of your shooting hobby.