This is pretty clear.

Colton Manufacturing Co. in the Sears 1900 Catalog No. 110 "Shoots Any Powder...made so strong at every point that it is adapted to the use of any grade of white, black or smokeless powder."



Andrew Fyrberg "Chicago Long Range Wonder" in the 1902 Sears, Roebuck & Co. Catalogue No. 111. "Our barrels are made for the highest explosive gun powders used, such as white or nitro powder...and could be used as safely as the regular black powder."




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