There are ways to get into casting your own boolits on the cheap :-) It is even likely that you already have some equipment suitable just sitting there.
You need lead,you got that in the form of the underperforming commercial rejects.
You need a heat source, A coleman camping stove,a heatplate,or a furnace can do . Many folks get by with the coleman and I even know a guy that used his old gas BBQ !
You need molds of course. Help on the choosing a suitable example is ample.
You need a way to lubricate the as cast boolits, You can pan lube using melted commercial sticks, or use Lee's Liquid Alox to "tumble lube" .
Casting your own can be enjoyable or frustrating,but the process in itself is as simple as melting the lead,pouring the lead into the blocks and dropping them out after they have "set" There are probably eight hundred variations on this theme though. Ask away and take a look around your home to see what you might already have that be put to use. 45nut