What the heck is DPF on the spine graph?  DPF stands for 'Depth Penetration Factor'.  This is a unitless number much like the BPF that TAP is known for.  Every year about the middle of summer when bowhunters are knawing at their bit to hunt, the topic always arises..."Which arrow penetrates the farthest?'

Wonder no more!  This column on the spine graph will show you with no question which arrow will penetrate the farthest. The higher the number the farther it penetrates.  Compare many arrows and choose what will work best for your bow.