Yep, Welcome to the Forum! Depending on where you hail from, there are a number of sources for ball, including casting your own. I have a .69 cal cannon also, and have found a couple of outlets for both Black Powder and Ball. Remember to use Cannon grade or 1F Black Powder, no smokeless or rifle powder, but you probably know that with your smokepole! This is the best forum, bar none, for ideas and info on Cannons, Howitzers and Mortars, pre 1899, around! Lots of these guys have been shooting and building cannons for years! Go back into the past pages and get ready to learn! BoomLover