Just lately been replacing my original Redding mongrels with Forster cross bolt lock rings.
I never tightened the Redding rings excessively but had to take over half of my Redding dies and clamp them in soft jaws in my vice to break the hold of the lock rings by applying multi grips to them.
Of course I could also be getting feeble with old age I guess.
They also theorise that grub screw type lock rings can tilt ever so slightly whereas the cross bolt ones don't as they fully clamp around the die thread.
Ancient Lyman dies I have have a lead ball in the bottom of the grub screw hole.
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