Alcan was not a powder manufacturer. Ballistite is (or was) a fast burning Swedish (I believe) powder that that was imported by Alcan and used in loading the Alcan brand of shotshells and also sold as for reloading in the 1960 era.
This website gives excellent information and photos of Baker Guns: http://www.picturetrail.com/sfx/album/view/17434920
Most experts consider Damascus, Twist and Laminated Steel barrels not safe with modern ammunition. The use of Black Powder loads in these barrels is suggested only after a thorough examination (including a bore scope internal examination) by a competent double gun smith.