Again Andy, there is no real "speed" advantage to auto indexing. You have to place the bullet, either before manual indexing or when the case comes to rest after you watch it move. So while it's more convenient, not really any faster. The case feeder & never having to move your right hand off the handle is where the speed comes in. If you do not use a case feeder on the 650, you have to fill the case feed tube every 20rds or so, that negates any small speed advantage IMO.I have owned a 550 for the past 15 years. I like the fact that it does not index automatically, because there are times that I just don't want that feature. For example, when setting up and adjusting dies or when adjusting the powder die to deliver a specific weight. I just don't need the extra speed that the automatic indexing of the 650 would provide.
The "fix" on the 650 is quite simple. Remove the shell plate, clip about 1/3 of a coil off the ball detent spring. It slows the shell plate index just enough to not spill powder. I just don;t like the many parts change over for small to large, so keep my 650 for 45acp & 45colt. Everyhting else is loaded on the 550B or my ss press. That is about 22 calibers now.I have both and love them both. I use the 550 mainly for 9mm to avoid the powder spillage while indexing. I know the is a workaround for this but I have not done it yet. I use the 650 for heavy 38 special production being in the PPC circle.
Having said that, the 650 has a superior priming system than the 550, which require frequent cleaning and is not as assertive as the 650.
I don't care much for the extra station the 650 provides. I don't use it. The powder measure on the dillons is so wonderful and constant, I fully trust it. Also, when I reload, I'm focused and don't see the need to buy a powder checker die for now anyways.
If you get the 650, the case feeder is a must. Before, I was a 550 guy, but now that I bought a 650, I kind of prefer it....except for the 9 mm (or other small cases where the powder fills most of the case) . For these, the 550 shines and prevents spillages.
Regards,
Guy -
The 650 may be a little faster in the scenario above, but if you are going to load pistol, rifle, small primer, large, and use one press, its hands down the 550. If large bulk runs or dedicated one caliber or primer size, get a 650. As one said here already, if you change a lot, the auto indexing can be very aggravating when your trying to setup new dies, or just switch bullets in a same cartridge but must adjust seating depth, tool heads once setup and kept, make that much easier with either press, but die adjustment and seating depth adjustment, is a pain when the handle moves constantly and you can't stop the rotation of the shell plate.
Regardless of your needs, these should be the only two progressives you ever need or consider, I won't mention the unmatched dedication to customer support or the true meaning of an NO B.S. WARRANTY!!
Running both, I can tell you the 650 is more than a little bit faster, but at a cost & complexity. It's why I leave it setup for 45acp & just run it that way. I can easily do 700rds/hr sustained. The best you are getting out of a 550B w/o case feeder is maybe 450rds/hr. The case feeder makes it that much faster. Adding one to a 550B, if you can keep it running right, will get you upto "close". For the guy that only loads 1000rds & wants to change over, the 550B is hard to beat. For the guy that wants to load 5K rds a month of one or two calibers, 650, no contest.