It was pretty neat
One time I loaded some 30-06 rounds a little too hot, I was shooting at on old turkey feeder it was probably 18-20 ga but the bullets were n't even denting it, as I looked it over better you could see traces of the lead splatter on the sheet metal, the bullets were spinning so fast they were exploding from centrifugal foce as soon as the touched the metal
But you gotta figure say it is a 12in 1 barrel, and the bullets were going 3400 Ft per sec, mulitiply that times 60, the bullets were spinning about 204,000 RPM