The sad thing about lead bullets being banned on indoor ranges is that the bullets are NOT the problem.
Seems like most of the airborne lead came from the lead styphnate used in the ammo's primers.
However, as lead in any form these days is not politically correct, the bullets get the axe and the cause of the problem stays. The one indoor rage I went to here in town will allow you to only use their ammo. Total metal jacketed bullets and lead free primers. They ain't cheap.
I just go to my outdoor range an shoot what the heck I want.
Paul B.