EKM,
Check out http://www.reload-nrma.com. They have a list of certified NRA reloading instructors on the site. An instructor in my area was open to being a mentor - supervise my reloading efforts the first time through. I was concerned about die adjustment as well. I had to defer the reloading bench plans until I finish with a house project, so I haven;t had the opportunity to take him up on the offer yet.

I mention that with the understanding that you' re looking for more than a mentor. I do think that some of the instructors offer more structured training but have never had cause to look into it further.