Grafoil is the maintenance product for barrels. Before using Grafoil we suggest on new barrels using Colloidal Graphite to fill the micro structure of the steel, instead of carbon and copper when the first shot is put down the barrel.
Every time the barrel is thoroughly cleaned, 3 drops of grafoil on a patch is pushed down the barrel. The synthetic oil pre-lubes the bore to help prevent galling of the copper bullet to barrel. The Colloidal Graphite helps fill it back in, what may have been cleaned out of the micro structure getting it thoroughly cleaned.