Why do threads end up like this? I usually resort to asking the experts here. Of course that'll be countered by the "experts there". So, I've mad my decision it's going to be put through with the rest of the action? Why? Here is the rationale from Price street, agree or not is up to you...but I'm going with 250 years of heritage ok? :-)
"Usually the hinge pins are kept in. Especially on guns that rely on the hinge pin for structural formation such as some from Webley and Scott and W.C Scott for example. Also, keeping them means that the whole unit is cased and there is little room for movement, the stronger the structure the less likely of problems. The plug (with engraving) is also coloured. The notion of having this nitre blued or blued is false on English guns, it's an after "bake" second rate solution".
That's it
T
PS I asked about this constant "brittle as glass" notion and I was confronted with a rolling of the eyes looking to the heavens.
