I get an occasional stuck live round come up the driveway, I fashioned a tool steel awl from a small long round file. Slowly and gingerly twist the awl on the live primer cup until a small hole pierces the primer, which is then flooded with penetrating oil to 'kill' the primer. Then proceed as normally to remove the stuck case.

Well this is a fine pickle we're in, should'a listened to Joe McCarthy and George Orwell I guess.