Besides their bomb and rocket payloads, the P-47 and the Typhoon both boasted powerful gun armaments. The Typhoon had four 20mm Hispano cannon. The P-47 carried eight .50 cal. machine guns with 400 rounds per gun, and it proved "particularly successful" against transports. The machine guns occasionally even caused casualties to tanks and tank crews. The .50 cal. armor-piercing bullets often penetrated the underside of vehicles after ricocheting off the road, or penetrated the exhaust system of the tanks, ricocheting around the interior of the armored hull, killing or wounding the crew and sometimes igniting the fuel supply or detonating ammunition storage. This seemed surprising at first, given the typically heavy armor of German tanks. Yet Maj. Gen. J. Lawton "Lightning Joe" Collins, Commander of First Army's VII Corps, was impressed enough to mention to Quesada the success that P-47s had strafing tanks with .50 cal. machine gun fire.
thats about all i can find about it at the moment about tanks being killed to by 50cal gun fire,,like i said about the mound of dirt thing,i have no idea if it was true or not,,but i read about it,,lol