What is Ballard style rifling?

Ballard style rifling is a type of rifling pattern characterized by its distinctive, polygonal grooves that have a rounded cross-section. Developed in the mid-19th century by the American gunsmith Charles Ballard, this rifling design is known for improving accuracy and stability of the projectile during flight. The grooves are typically deeper and wider than traditional rifling, allowing for better grip on the bullet. Ballard rifling is often found in single-shot rifles and is appreciated for its performance in both target shooting and hunting.