You have to ask people that work around it with their job. Plumbers, roofers, congstruction workers, telephone linemen/ cable splicers are all good choices. Tire stores have wheelweights, my favorite. You can buy "new" lead from foundrys. Google Rotometals, they have several blends and free shipping. Also try scrap dealers, even though many will not sell to the public. The smaller ones would be my first choice. Also google "castboolit, a really good forum about bullet casting. Also hit old newspaper offices,and print shops. Most don't use lead anymore, but may have some.Your range may allow you to mine the bullet traps/ backstops. This can be a dirty,hard job, but can yield lots of return.Look for an old sailboat, many contain lead. Just a few places that I have scored lead from. Lightman