TheViking said:I would never handle gunpowder without military knowledge, or the like!
I'd say the gunpowder debate is all pretty irrelevant. Modern cartridges (rifle, pistol or shotgun) are not filled with gunpowder but with various grades and quantities of nitrocellulose "powder". This is quite stable but explosive if ignited in a closed space. If a spark is dropped on a small quantity (less than a teaspoon full) loosely piled in the open, it just burns (very very quickly). I've burnt off spoilt powder and doubt it would be much use as tinder because it burns too fast.
As someone mentioned, it is very hard to pull the bullet out of a cartridge. If you ignite a round while trying to pull it apart, the case WILL explode, so DON'T. When making or reloading ammunition as I used to do as a target shooter, the very occasional mis-assembled rounds had to be dismantled to make them safe. This is done with a kinetic bullet puller, not pliers. Not something you usually carry into the field .
Shotgun shells on the other hand are easily cut or broken open and their powder is the slowest burning. I still advise against it though because of the risk of igniting the powder or primer. Except for out and out survival situations it's too easy to have a better alternative.
Alick