26 different British and 'Foreign' (likely Belgian) Damascus, Twist, or Laminated steel barrel types were included in the Birmingham Proof House Test of 1891.
Here's a list of the various damascus barrels available from just one Belgian maker in 1897
There were 32 barrel makers in
Syndicat des Fabricants de Canons de Fusil de la Vesdre in 1907. Some were likely specialists, but most probably made Two and Three Iron Crolle and
Damas Anglais.
Which Damascus barrel type do you wish to study? By which maker, in which country, with iron from which mine, and steel from which supplier, in what year of production? What minimal wall thickness or 'grade' of pitting (which we'll need to invent) would exclude a barrel from being included in the sample? What degree of internal corrosion or 'frosting'? External rusting? How many previous shells ignited in the life of the barrel will be adequate? What weight of shot and dram equivalent? What p-value will establish statistical significance?
