I recently purchased an 1861 Springfield from armisport and was hoping to hunt with it. However I qiuckly found that a .575 minie ball was way to small to achieve any accuracy. I've been trying to find a larger mould and ordered a .578 improved minie ball mold from Lyman. After making the new minie ball though, it seems to be the exact same size as the originial .575 minie. Does anybody here know what size minie ball I need for a tight fit and good accuracy. And if so where can I get one?