@Blue-fish
My last batch (around 80lbs) was about 20% lead by weight and the rest steel, zinc, aluminum, and zinc alloys. For smelting I just use an old aluminum pot I found in a parking lot with a pour spout hammered into one side to avoid spills when pouring into ingot moulds. I bought a $20 single element electric burner from Canadian Tire and run it out in my garage on max heat. You can only melt about a 1" thick layer at a time or else the steel clips from the melted weights cause the stuff above to just sit on top and not actually touch the molten lead.
@brybenn
I can usually get 4-5" at 50 yards with Lee Drive Key slugs out of my 870 with a smooth bore and about the same with factory rifled slugs. Out of my rifled barrel I can do about 2" on irons with factory sabot slugs but haven't tried my handloads in it.
I have been considering putting a scope on my 870 for the rifled barrel but have fallen in love with a friends Savage bolt action 20ga slug gun and will be getting one soon. After I pick that up any slug hunting I do will be with the Savage and 12ga slugs will be relegated to plinking, destroying broken electronics/small appliances, and just-in-case stuff.