I have always thought that white ring, that is used for transport and storage, as Fudd said, was made of ceramic. I'll look a bit closer at it. I'm still curious as to why the OP wants to replace the gauge, unless it's faulty.


So, I am also wondering, did Dean Harris at Skeet's Gun Shop, in Oklahoma, make the Skeet's Bore Gauges ? I sure would love to have a tiny one to use on .410s.