I was curious how important cleaning your old cases is. Assuming the case are not dirty (from dirt/mud, ect.), and that the hole at the end of the case where the primer ignites the powder is clear, how important is it to accuracy to clean the the old residue from the inside of the case?
Also, if you clean your case and there is a residue of soap/cleaning agent on the inside of the case can that mess with accuracy?
Any thoughts would be appreciated.