Raimey, circa 1905-1910 many makers used Krupp barrels. I can think of Ithaca, Fox, Baker, Stevens, Torkelson, Tobin etc. Unrest in Europe affected all of these makers, in that barrels became harder to buy from there. I have seen pictures of an old gun factory in the US that showed rough barrel forgings laying flat in racks along a wall. There must have been several hundred in that picture.