A chronograph system with a frame, at least two sensors, an accelerometer, and a processor module. The frame is configured to removably couple to a barrel of a firearm. The sensors are attached to the frame and are configured to detect a projectile as the projectile passes each sensor. A first of the sensors may be separated from a second of the sensors by at least three inches. The accelerometer is attached to the frame and configured to track an orientation of the barrel. The processor module is communicatively coupled to the sensors and to the accelerometer and may be configured to receive timestamps from the sensors and the orientation of the barrel from the accelerometer, use the timestamps to determine a velocity of each projectile, and analyze the velocity data and the orientation of the barrel to aid a user in adjusting a scope of the firearm.