ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,338, issued on July 29.
"Method of reducing gun barrel heating" was invented by Andrew W. Suman (Waterford, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cartridge includes a bullet on which there is formed a coating. At least an upper layer of the coating is porous and comprises a thermoset polymer and a filler. The filler may be a dry film lubricant. The cartridge may be used in a gun of the type that has a rifled barrel. A rifled barrel has a bore diameter and a groove diameter. The bullet may have a metal diameter that is less than the groove diameter but slightly greater than the bore diameter. The coated bullet may have a diameter tha...