I must put in 2cnts worth in favor of the Hornady LnL AP. I've had one for a few years and really like the bushing system they use for mounting the dies. Comparing the costs, at least when I bought mine, the Hornady was a good bit less expensive than Dillon once I had all the "goodies" to get under way. The LnL is actually better compared to the Dillon RL650 since the LnL is a true progressive. This fact makes it an even better value.
Some say that a progressive press such as the LnL introduces unnecessary complexity if you need to rotate the shell plate backward for some reason (usually talking about the 550 Dillon which has manual advance). I can't think of how to explain it, but you can move the shell plate backward if necessary, especially if you realize the need before the plate has moved much. Once I got used to it, the auto indexing was great, in fact I would almost say it was a safety feature, making a double charge very unlikely. I set muy Hornady up using a Lee Pro Auto-Disk measure and Lee dies mounting the Auto Disk on the powder through expander. I can't imagine a much better setup for loading pistol and small/medium volume rifle rounds. I've also had occasion to deal with Hornady customer svc. and they were very accomodating and helpful.
I do realize that Big Blue also has utterly reliable equipment and great customer svc. If I had bought a Dillon to start with, I'd probably be just as happy.
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Good luck and good shooting,
Jim