I just bought sight unseen a used round ball mold for about twice the price of a new Lee. It was represented as a Lyman, but it's black anodized aluminum - not iron, almost (but not quite) fits on any of my Lyman handles, is marked 513 on the upper front surface of both blocks and 50 CAL in slanted letters below the 513 on one block.
I bought it to use for a plinker load for my 50-110 and since the few round ball 50 molds currently available only seem to cast either .500 or up in the .520s .... I knew Lyman used to catalog a .512 and .515 and knowing I'd someday be looking for a .510-.512, figured I'd better grab this one.
I'd like to find handles to fit, a mfgr's name, any other info - right now I'm feeling a little burned on this "Lyman" mold, but still hoping I can make it work rather than going after the seller.
Thanks, Joe / hobbyguymaine / old windbag