We had our club here in FL "mined" last year - the company removes the lead, cleans it, re-graphites it and the club got 40% of the lead to sell in exchange for the miner getting 60%. The miner was selling 3,000# drums of it - we were selling 30# bags of it - it was going for about .50/lb at that time. As mentioned, it will be a mish-mash of shot sizes from 7-1/2, 8, 8-1/2, and 9 - but for routine practice it works great. For a tournament, different scenario.
Jim - around here we have a local guy that makes shot; unfortunately, it always has a dimple so it isn't quite perfectly round, but it's a small step above reclaimed in quality and price and well below what stores around here are selling Lawrence or West Coast for - about $27/25#. Lawrence and WC are selling for 45 ans up - I think they got stuck with stock from when prices were REALLY high and they won't budge on the price to move it