Just taking your lower number, you have a choice of pulling the handle on your press 1000 times or 200 times to produce that number of rounds...the higher number would be 5000 vs. 1,000.
For seven cartridges, you're looking at either 7,000 or 35,000 times. Just the wear on your elbow and shoulder would be enough to make it worth while for me
I hadn't thought of it that way.
The majority of those are at the low end.
But I'd have to stop loading some of them to save the arm pulls because switching cartridges and / bullets isn't the progressive press' strong suit. I'm not buying all of the dies, plates, etc. to load all of those calibers and spending the time setting everything so I'd have to give most of them up.
It seems the best move would be to only plan on loading one, maybe two cartridges on such a press. 9x19 is probably out because the savings are very little.
The next is .45 acp, .38 spl, .38 Colt short, and .32 magnum.
I'm probably going to quit .38 Colt short once I finish the bullets I'm loading them with now.
The others will stay.
I load smaller numbers of .44 Russian, .357 mag, .32 S&w Long, and .25 acp.
I could probably drop the .25, .32, and .357.
Once I finish my .32 acp stash (I don't load it) there is a chance I may add .380.
Oh, I wish I could standardize on say, two cartridges, but I'm just not gonna do it.