The MagnetoSpeed barrel-mounted, ballistic chronograph has brought modern convenience to the often tiresome task of measuring bullet velocities. The MagnetoSpeeed chronographs use ground breaking electromagnetic sensors, instead of problematic optical sensors, to eliminate common chronograph problems. Magnetospeed chronographs are swift to set up, accurate, impervious to light conditions, do not blow over in high winds and easily fit in a range bag. The display unit stores up to 99 shots per string, calculates useful velocity statistics and saves the data in a spreadsheet format to a micro SD card.