A tutorial on testing a variety of ammo brands in a precision rifle. Do a controlled test. This one consists of three-shot groups at 100 yards with ammo of the same weight from three different manufacturers: Remington, Winchester and Federal. Split-screen video shows the shooter firing and the target as it is impacted by the rounds. Comparative results are shown after firing is completed. What does this kind of test tell you about the rifle? The ammunition? The shooter?