I think this would have been in long ago if the evil demons from the realm of stackable items weren't against it.
idk, this game isn't all that realistic and it seems like a kool idea but that being said have you ever heard of crazy motherfucker reloading gun nutz dismantling there ammo and wildcating new loads? You are aware that different powders create various psi per volume, burn at different rates etc,. It would be very dangerous I think to just pour out the powder from dissembling all your ammo into a bucket and loading up some shells. I think I'd let you be the first to pull the trigger with your own gun of course