Description Cuts Through Toughest Bullet Jacket & Powder Fouling – Cushioned Abrasive Action Leaves Bores Sparkling – Won’t “Eat” Stock Finishes The original, time-proven formula developed by Jim Brobst and produced under exclusive license. J-B has been getting burned-on, caked-in powder residue and copper jacket fouling out of gun barrels since the 1960’s, and hasn’t damaged an inch of rifling yet.
