Another post agreeing with wasting money on that die - the "competition" part is absolutely not needed.
As to your question, it's been answered and my experience mirrors that. Just a little short of the junction. The area of the neck that doesn't get sized in this process can sometimes get what I've heard referred to as donuts - but I've been lucky and haven't experienced them myself, so I'm not sure what standard procedure is to get rid of them. Perhaps just a standard full length sizing die?