Although I have rattled in Bucks a few times over the years, I have never been lucky enough to kill one doing ratteling alone.
Now I have killed several using ratteling and grunting or grunting and rubbing small trees with my bow limb at the same time.
I think how much you rattle without getting caught is more important than how you end a sequence.
But then I am not that successful on this subject.
Im like Greg, I wont leave home without a good Grunt call.