Patternmaster is the culmination of a single goal - how to have a better hunt. Approximately 20 years ago, as regulations were in place to ban lead shot from the marshlands, Patternmaster revolutionized the wing-shooting world with U.S. Patent #5,452,535. The idea was simple enough - create a more effective shotgun pattern to make steel shoot like lead - and they did it with a relatively simple but brilliant idea. The Science of Shot is what we like to call it.