Thompson Center Patriot Black Powder Perc. There a little ring of pits in the middle of the bore, but very minor. The rest of the bore is really nice. The item “45 Cal. Thompson Center Patriot Black Powder Perc. Pistol Barrel Vry. Poor Cond” is in sale since Sunday, February 16, 2020. This item is in the category “Sporting Goods\Hunting\Vintage Hunting\Black Powder”. The seller is “lure100″ and is located in Rose City, Michigan. This item can be shipped to United States.