Match Grade Accuracy Without Custom Costs. All Butler Creek .920 bull barrels include a Bentz Match chamber. Stainless barrels are made from 416 stainless steel. Each barrel lot is test fired to ensure consistent accuracy and uniform performance. Features Tri-Port muzzle tamer. The barrels also combine special bore & groove ratios with the Bentz Match chamber and recessed target crown to provide excellent accuracy with a variety of target or standard ammo. Precision machined fluting that enhances accuracy and promotes cooling.