What does rifling twist rate describe?

What does rifling twist rate describe?

• A. The distance over which the rifling completes one full turn
• B. The bore diameter
• C. The number of lands and grooves
• D. The length of the barrel

Answer: (A)

Rifling twist rate describes how quickly the rifling spins the bullet as it travels down the barrel. It is the distance the rifling covers for one complete 360-degree turn, usually stated as inches per turn (for example, 1 turn in 12 inches). A faster twist (smaller distance per turn) imparts more spin, stabilizing heavier or longer bullets, while a slower twist imparts less spin. This is not the bore diameter, the number of lands and grooves, or the barrel length.

Rifling twist rate describes how quickly the rifling spins the bullet as it travels down the barrel. It is the distance the rifling covers for one complete 360-degree turn, usually stated as inches per turn (for example, 1 turn in 12 inches). A faster twist (smaller distance per turn) imparts more spin, stabilizing heavier or longer bullets, while a slower twist imparts less spin. This is not the bore diameter, the number of lands and grooves, or the barrel length.