I just ran the numbers for the rotation of a bullet fired at 1200 fps from my Whitworth muzzleloading rifle (twist of 1 turn in 22 inches) and come up with just short of 40,000 rpm !!! .. That is over 40 times the speed of rotation of a tire on your car traveling at 60 mph... I knew it was fast but WOW !! That bullet goes from a standing rest and in the distance of 33 inches and a flash is at 40,000 rpm! Never appreciated that but now I do.