Tinker,
I borrowed one once from a muzzle loading friend. It worked well enouch and the balls dropped at the proper diameter. The only complaint I had was that the sprue had to be cut-off afterwards (non-sprue plate)It was a bit of a pain finding something to make a nice clean cut with. I would specify that it cast a .620 ball in pure lead. That way you will always have the option of casting either a lead/tin alloy or pure. If you specify a alloy say 20:1 etc. then a pure lead ball will drop small.
Best regards,
Terry
