At least Donnie knows to be careful with this sort of thing. Gunpowder's certainly nothing to mess around with.

The ammunition is at least kept in better shape than the things in the storage shed, although given that they'd been put to use not long ago, it does mean that there needs to be some replenishing. But there are still some prepared charges, and Donnie picks out one of the sack-looking things, checking it over to make sure it's in good condition before he walks it back to the cannon to insert it into the barrel.