All my Redding lock rings have the lead in them. Once removed you can see the thread pitch in the lead. And despite the lead they still locked up after not being loosened for several years hence the trip to the vice and soft jaws. And no, I didn't strongarm them. Have changed all mine to Forster. A vastly superior lock ring.
And yes, no thread damage.
Also, if removing the Redding lock rings for some reason and intending to refit don't wind the grub screw in whilst removed. The wee bit of lead either falls out or protrudes enough to give a bit of grief when attempting to refit.
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