Dave France, 6th. Wisconsin Infantry, N-SSA, has just had a very comprehensive article on casting bullets including balls and minies published in the latest Skirmish Line. The 8 page article is titled Suggestions for Casting Bullets and is found in the latest issue of The Skirmish Line, summer 2021, vol. 66, #2. If you have a friend in the N-SSA you might borrow the issue from him or have him give it to you when he is finished. It wouldn't be ethical to copy the article, please don't ask, but it would certainly be a worthwhile read if you can get a copy of the mag.