Magneto speed! - Magnetospeed Sporter Barrel Mounted Ballistic Chronograph

Excellent tool for precise measurement of your bullet/pellet speed - in all weather conditions, no matter where you are (unlike some other chronys that require sunlight, shades, etc...). Easy to use and operate, with enough memory for average shooter. Only thing I wish this cheaper model would have is the ability to mount it on rail (like more expensive one).