Originally Posted by wildcatter

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!!