Underwood Ammo XTP rounds are notable for their power and accuracy. We utilize Hornady eXtreme Terminal Performance bullets which are designed for deep terminal penetration, great accuracy and controlled expansion. We combine Hornady unparalleled XTP bullets with your own formulated design which results in one lethal round. As with all of Underwood Ammo rounds, we utilize flash suppressed powder so that vision will not be compromised if it becomes necessary to use your firearm in low light. This high-performance ammunition is field tested using popular, real firearms that our customers are most likely to own out in the real world with all the elements you would experience. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.This product also features a Coefficient of 0.15, Gun Type: Rifle, Rating: Supersonic, and a Sectional Density of 0.20.