How could any machining marks be visible after the hand fitting of the barrels to the breech face of the frame?
The marks are done by hand after fitting, bluing and fine polishing of the breech face. Purely cosmetic in nature.
Broaching, striping, cross hatching... I am sure there are many other names used for this.
I had heard it referred to as broaching. But as dean suggests, technical broaching is a machining process. Who knows what this cosmetic pricess is technically called.
When i do this, i normally take the polish up to 1,000 grit and then use either that same grit or finer to put the marks on the breech.
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B. Dudley
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