Here is an interesting study from the Center for Disease Control regarding both lead exposure and noise exposure to instructors and students at an outdoor range in California
It basically states that the lead levels were present in some areas but that it did not exceed safety levels. It did however say that earmuffs alone did not provide adequate hearing protection and that plugs should be used in conjunction with them. That being said, I would not bring a newborn to the range because of cross contaminating of lead. All the dad needs to do is touch contaminated surfaces and then the baby's pacifier and now it is exposed. Here is another article from the American Academy of Child & Adolescent Psychiatry that tells of the dangers of lead exposure in children who have rapidly developing nervous systems.
I really need a life.
My Zombie Apocalypse Collection
Bersa Thunder, Browning Buckmark Camper, Charles Daly 1911, Charter Arms Buldog Pug, Chinese SKS, Colt Double Eagle MK II Series 90 10mm, Egyptian Hakim 8mm, Heckler & Koch P2000SK, Kimber Eclipse Ultra II, Mossberg 500A Cruiser, Mossberg New Haven 600AT, Romanian M69 Trainer, Rossi Ranch Hand .44 Mag, Savage Arms Model 73, Smith & Wesson 1006 10mm, Smith & Wesson Sigma .40, Springfield Armory XD-40, Walther P1, Wyoming Arms Parker 10mm, Yugoslavian K98