Originally Posted by
super_hunt54
Yep and you can pretty easily tell what's residue and what is actually unburnt powder. Quality of the powder also has a LOT to do with that as well.
The grade too. 2F with show more unburned than 3F.
No matter what you use. It won't all burn. Even with the long barreled Kentucky rifles.
It's why BP is not that powerful. I'm not saying anything you don't know already.