I suggest that you make quite certain that the ventilation system of any range you attend is both effective and functional. Lead poisoning from airborne lead particles and from the lead in the priming compound of most ammo is no joking matter. A free spirit and loose rules are fine but if you are dosing yourself with lead fumes, it is not a good bargain.
This is being written by someone that did not worry and has spent over a year getting his blood lead levels down to near normal.
Trigger control + Breath control + Sight alignment = Gun Control.
NRA Smallbore Prone Master