Cornfused!
Todd,
I have just recently gotten into the "progressive press" crowd. I guess that is relative, within the last 3 years anyway. That being said, I think we are missing something. I'm not familiar with the "AT" version of Dillon presses. Are they the forerunner of the "RL" versions? What is a "500" too?
The presses I have seen on their website seem to suggest that you are looking at an older, maybe used press, that can be upgraded.
I know, "you have an idea" but, I'm afraid I have to put a wrench in your works. I would like to suggest getting an XL650 for my first progressive, that is if you load rifle cases. If not, may I suggest a Square Deal B?
I agree wholeheartedly with pinky on this one. No manual indexing progressive for me. I don't have any knowledge of the L-N-L but have heard that it is a great press too.
The danger comes in being able to double charge a case by accident. The presses I have suggested can only do that if you physically back the shell plate up. It can be done, and yes, I have done it, but is very difficult to do.
Is cost a factor? Try used from flee-bay. If you get a lemon, all you have to do is send it to Dillon and they will fix whatever is wrong for $40 or so.
I have 3 SDB's and an XL650, Lee Classic Turret Press (in cast iron) and several single stage presses along with a Lyman Spar -T.
This is just my 2¢!
p.s. Dennis has given good advice too.