Alliant Herco Smokeless Gun Powder For Sale. Each bottle of Alliant Smokeless Powder is backed by a century of manufacturing expertise and the industry’s most stringent quality control systems. In a ballistics laboratory, the chemical composition, grain shape and size, and overall density are regularly monitored and tested to assure uniformity. Herco smokeless powder has been used in shotshell loads since the 1920s. It is a great high base hunting load appropriate for upland game and magnum pistol loads. Available in 10, 12, 16, 20, and 28 gauge loads. Alliant Herco Smokeless Gun Powder For Sale.