Yep, what they said.

There's 5-6 pounds of lead in those bullets. A caster would like to have them to melt down and may even pay you for it or swap you something in return. Your flower beds will like the gunpowder fertilizer. You can then run the cases into a sizing die (minus the decapping rod) to true them up and then reload them with your powder/bullet of choice.

"You can lead a man to logic, but you cannot make him think." Joe Harz
"Always certain, often right." Keith McCafferty