I've done a lot of work, and research, on the issues of lead and shooting/reloading both for myself, and professionally.
Eating lead is less harmful than it being on soft tissues with a solvent, which is less harmful than inhalation. That is the same form, just an increase in uptake. Remember, farmers fed lead to chickens to try and prove lead shot should not be outlawed for waterfowl. Granted, lead projectiles, alloyed.
I still dry tumble primed pistol and wet tumbled de-primed rifle. Yep, there is lead in the dust from dry, but I keep the dust down using corn cob with Lucas Oil polish and run a vacuum when transferring and when using the media separator. Yes, there is lead in the water after wet, but much less, and in a less absorbable form. I don't handle it, I dump it.
And yes, I get my lead level in my blood tested...it was in the "normal" range a few weeks ago (under 1µg/dL). 7 years ago, it was just at the top of the normal level (just at 5 µg/dL). 20 years ago, it was above the normal level (about 8 µg/dL). I don't shoot indoors at all, and I no longer use walnut to dry tumble.
I have known folks to have no other exposures except shooting reloading with >40µg/dL. Almost all shot indoors a LOT and/or dry tumbled with walnut a LOT. I was actually surprised that the guys who cast their own bullets, if they shot outside and did not use walnut, were all under 5 µg/dL. So far, I have not heard of anyone who wet tumbles and shoots outside to have anything other than normal lead levels.