Give Fort Chambers Gun Shop, Chambersburg, PA a shout. I know they have .610 balls in stock. I buy them there to shoot out of my miniature cannon. I'm wishing as I type this that I hadn't been so dilatory in buying the .610 mold I've been threatening to do.

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