Hi Mike!
The Lee pro 1000 is a great press, but they are fussy, and they are not all that easy to change over. I switched from .38 special to .45 ACP; because my .45 brass takes large pistol primers, I bought a separate .45 shell plate holder set up with the proper primer feed as well. Shell feeder needs to be changed, as does the brass pusher, heights and clearances have to be adjusted, and the whole process took me a bit over an hour. If you are are not changing over the shell plate holder, just going from 9mm to .40, about 1/2 hour would be the expected time to change over; including verification of the powder charge and COAL.
I did initially intend to do .223 in mine as well, but with I have yet to try. If I have time this week, I just might give it a go.
I presently have two of these which minimizes change overs. I know of another guy in Listowell who has 4 and never changes over.
In my opinion, the Hornady Lock and load progressive is likely the best, easiest to set up, and has one of the best primer feeds available; but you can buy 3 used pro-1000s for the price of one of these new. LOL
https://www.youtube.com/watch?v=Z0agpmbg34I