I would have gone 250-260 for weight, 2 pb, 2 gc cavities. Or, 1 each with 250's, and 1 each with 280-290. Even with a single cavity per bullet type, you'd cast enough in an afternoon for a lot of shooting. I like options though. Good luck with the project. Let us know how it goes.

I belong on eroding granite, among the pines.