For what it's worth I have an 1884(letter) hammer gun with "Stub Twist" 32" barrels and it has checkering. The stub twist was the most basic of twist steels. I truly believe there may have been general rules, but nothing was hard and fast.
A bad segue, but my barrels are in good shape and I've read the reports on the strength of Damascus vs. steel, but does anyone know where I can research the strength differences between the fine english damascus down through the different grades to include my stub twist?
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