I have been pointing this out for like 20 years. Even with good sanitation and PPE, lead residue from shooting is surprisingly hard tocompletely eliminate. I was as shooting maybe a couple of times per week, primarily with a bolt action rifle and shotgun, wearing gloves, wiping things down, and I could still find detectable lead residue on my range bag, and in my car (!).

Someone who is putting hundreds of rounds per week of dog shit ammo through their AR is 1000% exposing themselves and their family to a slowly increasing background supply of lead.