This:
and this:
Anyone who has tried to use a Lee locking ring to fix the adjustment on a die, so you can install, remove and re-install and get exactly the same position doesn't really "get it" . It's physically impossible for the lee ring to maintain it's position on the threaded body of the die. All it can do (and does quite well) is apply pressure to the press/turret/breach lock bushing and prevent the die from rotating and backing in or out.
All the forces acting upon the die in normal operation are linear.... None are angular and will cause rotation. No rotation...no change in adjustment.
Lee designs his dies to be used with his system, and 90% that means you adjust the die and never remove it again. Rather, you swap out the bushing or the turret.... Again, not causing the die to rotate. No rotation, no change in adjustment.
and this:
For the Lee system of presses, the rings are fine as they are mounted in some kind of tool head and rarely get removed from that tool head.