Rounds per hour should not be the deciding factor IMO....but rather, how ,any can you SAFELY load adhereing to SAFE reloading techniques. If $$$ is no object, why not go with the 1050? Don't want to spend the $$$, go with the 650; don't want to spend that much $$$, go with the 550. Any Dillon press will give you a lifetime of use with just a little care and maintenance.
I use the 550 and the 650 (with casefeed and no powder check system). I use my
M1 MOD 2 eyeball (read bifocals) to check EVERY powder charge. How many can I load an hour on each machine? I don't know because I have never (nor will I) timed myself reloading. The nature of design of each machine (550-650-1050) will ultimately allow YOU to complete more rounds/hour, but, just how many, is a function of adhereing to YOUR safety margins.
As an airline captain, I'm often amazed at the number of people who are more concerned with "what time are we getting there" rather than the simple request "please get me to our destination safely".
Further, not wanting to ding anyone here, but, why in the world would you want to watch TV while reloading? Talk about the ultimate distraction. Pilots at my carrier are not permitted to read any nonflight related material, listen to or watch entertainment devices while on duty on the flight deck. Why? Loss of situational awareness, greatly reduced safety margins, along with numerous other reasons. Not very hard to apply those issues to reloading. In this thread I've read about squibs and double loads. Sounds like either a break down in safe loading technique, distractions, or loss of situational awareness (I wonder if powder drop into that case?).
Please don't make reloading a race against the clock....we are all doing this for fun and relaxation (well mostly fun, relaxation and the simple joy it brings). Live to reload and shoot another day with all your body parts properly intact.
Time or how many YOU vs someone else can pump out in an hour should never be an issue.