Lead solder is mainly a problem in Europe where they like to incinerate trash. During this the lead is vaporized and like with most gases scrubbing is a matter of percentages, not whether you remove it all since that's impossible. Solid lead is harmless, you can handle it all day without problems. Lead bullets don't cause lead poisoning - you bleed out if you're shot, poisoning is really not a concern. The real problem is when you poke holes in the meat bag, the bullets themselves are sometimes left in place. The main problem is when it's used on ranges small amounts of it is turned to dust or vaporized, which makes it bioavailable. Just lead bullets themselves are not a concern - you could eat them and just poop them out the other end; they're not bioavailable. Copper jackets are likely to cause more problems. The problem with lead paint is it contains lead alloys that are highly bioavailable, taste sweet, and is difficult to keep away from children who might eat it like candy and hence can get huge doses of it - not like the naturally occurring trace amounts. Steel bullets are a problem in dry climes since they tend to spark fires when they hit rocks. (And believe it not, ingesting bioavailable iron in sufficient quantities will similar to lead cause iron poisoning.) For this reason shooting ranges tend to ban them.