I love this question! I have a friend who might have a dillon 650 with a case feeder and might load 1K-2K at a time in each caliber. No point in doing all the set up for 10 minutes of loading he told me once.
He owns:
9MM
38 special
357
44 MAG
45 ACP
204
223
308
300WM
So the answer to your question.... A lot.... for him.
Me... Guns scare me!