Alliant Power Pro 2000-MR 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. Power Pro 2000-MR provides improved velocity and consistency from Lot to Lot. BAlliant Power Pro 2000-MR Smokeless Gun Powder For Sale. Power Pro 2000-MR is a spherical powder developed for medium rifle calibers that improves velocity and density for easy metering. Because it is developed for certain cartridges and uses, it will enable reloaders to make loads that are comparable to factory-loaded ammunition. Superior performance in both 223 Remington and 308 Winchester cartridges.