Bowhunting Prep: Static Spine vs. Dynamic Spine

The basic definition of arrow spine is how much an arrow bends (it's the number printed on your arrows, usually 3000-4000). But there's more to it than that. In the real world archers have to deal with dynamic spine: your arrow bending and flexing in three dimensions. So, when you tune your bow, consider your broached weight and arrow length, because both have an impact on dynamic spine.