It was a limited group buy from Lee. I suppose Lee still has the cherry but I don't know what it would take to get them up and going on the molds again. I think we ordered 25 molds and those were all claimed from the get-go. My thinking was to design a bullet that would do well in both the Whites and the 1:28/1:30 twist rifles and it seems that was accomplished. Batchief's group was the first fired with the bullet so far as I know.
I think most of those molds drop bullets at about .505 diameter, some a fraction less and some a fraction more. Easily sized down to .501 if need be.
ps: Have Dan whip you up some to try. Can't beat his prices - makes casting them yourself almost seem like a waste.