If you have a LOT of them and your not casting your own, you could always look into smelting them into ingots and selling them as range lead.
There are a lot of folks looking for just such alloy to pour their own bullets with. All you would need would be a good heat source, a cast iron or SS pot to melt them in, a ladle to dip and pour the lead with, and some cheap steel muffin pans to pour the lead into. Figuring you could sell the recovered lead for upwards of a buck a pound, you could recover your cost pretty quick.