I believe you. I'm sure it's quicker to process & load up too. I've never swapped a 650 over. Is that time difference swapping case feeder, primer size & shell holder too ? Seems more complex on the primer side(and harder to fix a problem if one comes up due to the auto-indexing). I imagine I'll have a 650 someday.
Yep, about 10 minutes all up - assuming you've got another toolhead ready to go. Obviously it takes longer to get your toolhead/dies setup if they're not ready to go in a separate toolhead.
The 650 conversion only includes:
Casefeeder plate - lifts out in seconds, and there are only 4... small/large pistol and small/large rifle
casefeeder droptube adaptors - these are just plastic bushings that slip together, and only take a few seconds
Aluminum casefeed adaptor - this thing screws in from the bottom and is the most difficult part of the process, still not tough, but takes a minute
Shellplate feeding ram - the thing that pushes a case into the shellplate. This has to be flipped to switch between pistol/rifle. One screw, takes a minute.
Shell feeding track - lifts right out when you pull back the feeding ram
Shellplate and locator buttons - same deal as a 550, a single setscrew that locks the shellplate shoulder bolt, takes a minute to swap
Primer system - with primer magazine empty, you remove two long screws and lift the entire primer system off the press. Remove a little screw that captivates a clip, pull off the primer feed wheel and replace with the other one (small or large). Put clip back in place, install screw. Drop primer system back onto press, reinstall screws. Takes 2 or 3 minutes.
Primer Ram - Unscrew from below, screw in new one (large/small). Takes 2 minutes because it's not that easy to get at.
Most of the time, you won't be swapping all of this. For example, to swap between, say, 30-06 and 243, you'll keep everthing in place but the casefeeder wheel, the droptube bushings and the toolhead. That conversion literally only take a minute.
The most time consuming swap would be from, say, 30-06 to 9mm, which'll require all of the above items. Still, not a big deal after you do it a couple times.