Get it while it's hot.
Fourty cents?! Mail me some!!
I, through no work of my own, have gained access to an LEO training facility (0-400 yd) with easily-mined backstops, steel targets, and bullet trap dumps all over the place.
At this point, the place feels like it contains an unending supply of range lead. I go with my brothers, when we have the time.
Bullet trap dumps could easily provide 100+ lbs in 10 minutes, per dump (six? total), at least twice a year. So far, we've left them alone, because there's so much powder and oxide in the mix.
Steel target "splatter mounds" have plenty of lead, but we've avoided them thus far.
The berms are where we spend most of our time. Although some people would balk at the job, we run about 20 lbs per hour, per person, and the bullets we're picking up are, literally, hand-picked.
Take four people and spend just half an hour or so picking gems out of the berm, and there's 40 lbs of raw range scrap in the back of the truck.
I can't imagine how much we'd get if we actually screened the dirt...