When I got a die adjusted just right and tightened the screw in the lock ring, it would prevent me from removing the die from the press.
The Hornady clamp is designed for the LNL bushings. That's why you can't unscrew it when you tighten the clamp.
You can buy LNL adaptors for in your rockchucker to replace the threaded insert in it now but then you are committed to either changing the adaptor every time you want to run dies you don't have bushing for, or you need to buy a lot of LNL bushings, enough for all your dies.
Then once you tighten the clamp down on the LNL bushing it stays there like it should. Then just pop the die and bushing in and out of the single stage press.
You cannot take them out of a LNL-AP press and pop them into a Rockchucker and use them without changing the settings on the die.
I made a spacer for my RCBS Rockchucker so I can take my dies out of the AP and put them in the Rockchucker without changing the settings on the dies.
This is a major time saver for me. The only die I have found wouldn't work easily in this setup is my Lee Auto Prime ll. It does work but it's on the last thread for the jam nut to get it screwed in low enough to prime my cases. I thought about making a longer punch for in ram but it hasn't failed yet so I use it as is.
For bulk 9mm I went with the XL750 w/case-feed. It's ridiculously fast.
So is the Hornady case feeder if you set it up right. The last time I clocked my case feeder with 9mm cases, I was resizing and priming at 33 cases/min for first pass, and my case feeder kept up to me, that's 1980/hr.
It doesn't like long skinny cases like .327FM because it really slows down with them. I doubt any case feeder will be fast with 327 cases, they are to long for all the heavier the case head is.