I use my dirtiest cases for my precision ammo that I take to the yearly fall shoot at the local rifle range. I weigh them as well as the bullets and trickle the charges to get the most out of the ammo. But they look like they were rolling around the floor of the old pickup for 20 years before I stuffed them in my pockets. I make sure that I announce that those rotten old reloads just might not shoot well at all as I nail the X ring pretty much each and every shot. All part of the fun down there each fall.