Re the powder coating, why not? Looks cool, with the 9mm shells looking like my wife's lipstick. Ballistically, it's really not that different to paper patching, and might similarly get round barrel lead fouling - and then presumably also less lead dust thrown out with the muzzle gases.
Studies done on kids growing up in 70's vs the 90's. The former measurably less intelligent than the latter, linked to lead inhalation from traffic smog generated from leaded petrol (I remembered the study as I'm in the former group, still made it through uni though). Bear in mind also that depleted uranium is bad news, not because of radiation but because it, like lead, is a heavy metal.
Sensible upshot is, don't mess with lead, limit exposure -- but don't freak out either.
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