I have three progressive presses for rifle/pistol ammo and I still end up seating more primers with my original Lee Ram Prime. In the time it takes to pick up 100 primers in those little pick up tube, I can seat half a box of ammo. Of course you have to load three of four 100 round boxes at a time so you end up dumping out 400 primers to pick up with those little tubes.
I have found sizing my brass is
usually a task unto itself. After sizing and cleaning off any lube, it is almost as fast to prime with the Lee tool as it is to set up my loader to do the priming.
However, if I have a large batch of ammo to get out, say 800-1000 357s or 38s or something of this nature, then yes, I load up 500-600 primers in the tubes, use my carbide dies and will load like a madman for about two hours to get them done. One set-up and a long run on the press.
Someday someone will come out with a priming system that is faultless and I will be sitting back in my rocking chair shooting up ammo that took me years to reload....
Steve