I would take a slightly different approach:
Contact RCBS, Hornady, Redding, MEC, Lee and Dillon, and ask them what they think. These are the companies that make their living supplying hardware to the reloader. Their marketing departments are paid to know who reloads, how much they reload, what they reload, and what makes them break out in a sweat and breath shallow.
I'll bet that even though they won't give full data that they will be willing to share basic numbers - including some reloaders that they are not interested in reaching.