What is 400 spine arrow?

The term "400 spine arrow" refers to a specific type of arrow used in Archery, characterized by its stiffness and flexibility. The "spine" measurement indicates how much an arrow will bend under a specified weight; a 400 spine arrow is designed to flex moderately when shot, making it suitable for certain draw weights and shooting styles. This spine rating helps archers select the appropriate arrows for their bows to achieve optimal performance and accuracy.