http://www.wwpowder.com/PDF/MSDS%20Files/Smokeless/Winchester/BALL%20Powder%20Propellant.pdf Winchester/Olin ball powders were made by Primex Technologis,Inc in 1999. In Nov 2000 General Dynamics/St. Marks, Acquired Primex Technologies, Inc. ATK(Alliant) and General Dynamics (ST. Marks) Form American Powder Company. June 2001
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