I see your luck is like mine...the Clue Bird did fly by, but waited until the last second. I'd still be a little cautious of Zamak weights having been introduced by the operation that made them anchors, depending on how long ago they were made. If you have trouble making bullets out of them there are some things you can do to salvage the alloy, so don't get carried away with adding any tin until zink contamination is determined. Do you know the hydrochloric acid trick for detecting zink in the alloy?