Black powder, no cannon ball, it goes boom and a lot of smoke comes out. You can see this at reenactments everywhere.
Glad you asked that question! It is vital to the core of the hobby!
Fill that rusty canteen with apple cider vinegar, cork it, and leave it in the back of a cool, dark, closet for 16 weeks. That will fix everything.
Glad to be of service!
1. All guns are always loaded.
2. Never point at anything you are not willing to kill.
3. Keep your finger off the trigger until your sights are on target.
4. Be sure of your target and what is beyond it.