OK, I got enough encouragement from shooters who aren't afraid of their own shadow, and enough doom and gloom from the guys who believe global warming and seem to NOT have time to shoot at all because they're posting over 8,000 times to go ahead with this.
It may comfort you to think that's the kind of people responding to you but you'd be wrong.
I've done the vast majority of my shooting at indoor ranges including the last time I shot a firearm which was this weekend and the last time I shot an airgun which was at my home indoor range.
I've never had my lead levels tested because I'm not a doom & gloom sort and because I take reasonable hygiene precautions when shooting or when dealing with any sort of lead exposure. For me that's soldering with lead solder, cleaning firearms, handling airgun ammunition, shooting at indoor ranges, etc. Lead exposure isn't some thing that I'm afraid of, it's just something that I'm informed about. After getting all the facts and weighing the risk, I decided that I'm not interested in putting smoke containing lead compounds into the air inside my home. There are a number of things I do that I wouldn't necessarily want to do inside my own house.
Finally, no one's saying that shooting indoors can't be done safely. The simplest approach would be to use lead-free ammo with lead free primers. That kind of ammunition is widely available, and when you consider the fact that you'll save on range fees and gas driving to the range means you'll probably be able to more than make up the cost difference for buying lead free ammo. It will certainly simplify clean-up issues and completely eliminate any possibility of problems with future owners having issues with lead contamination.
If you absolutely must use lead ammunition, then I suggest you get some input from an indoor range operator on ventilation and how to deal with removing particulate buildup.
Kool Aid - blood tested and all is normal
Great that your levels are normal. However that doesn't change the fact that shooting at indoor ranges has been shown to result in elevated lead levels in many cases. The range you use may have very good ventilation, or there may be other reasons why you haven't had problems, but that's not evidence that it won't be a problem for anyone and it obviously isn't proof that it hasn't caused problems for others in the past.
It certainly doesn't prove that concerns about lead exposure at indoor ranges are "Kool Aid".
You cant avoid all risk in life and Im not against reasonable precautions but we have developed a culture of gloom and doom...
No one has suggested avoiding all risk. I assume we're all shooters here and that certainly comes with at least some level of risk from a variety of sources. In addition, a good number of us use indoor ranges either for most of our shooting or perhaps even exclusively. There's a huge difference in trying to avoid all risk and pointing out the risk so that people can make informed decisions.