Originally Posted by MichiganScott
if you look at the case it will likely have the letters "NT" on it, for "Non-toxic". It means the primer used DDNT instead of lead styphnate. DDNT is a more violent explosive. If the flash hole isn't made bigger the primer backs itself out of the pocket.
Was it Federal or Winchester that had a non toxic primer in the standard marked case? I know that occasionally I will come across one or the other that looks like Bubba took his drill to the case.