Here's the thing to do...If nothing else, just for grins.
1. Empty the lead shot from the shell
2. Melt down some candle wax and mix in the shot with it
3. While still melted down, pour the wax/shot mixture back into the shell
4. Let the wax harden
5. Load into any double barrel and put bigass holes in anything you shoot
Me and a buddy did this and went to town on an old IBM CPU housing. Quite fun indeed.