Directions with the die?
Please don't take this the wrong way. You have been given some pretty complex answers to your question. Not sure of how long you have been reloading, but the dies typically come with pretty clear directions on how to set them up. Whenever I have something that doesn't fit right, I go back and re-read the directions that came with the dies first. Invariably, I have found that I have done something not the same as last time, going from memory instead of actually reading them while I am doing it, and this has always corrected my problems. As stated, most dies work if you set them up correctly. Keep it simple and start there, then try some of these more complex answers. Most of these guys have been loading longer than me, I have only been loading for four years, but the directions with the dies are there for a reason.