While taking advantage of state of the art testing equipment, this high performance ammunition by underwood is field tested using popular, real firearms that customers are most likely to own out in the real world with all the elements you would experience. If for some reason Underwood Ammunition fails to meet performance expectations, Underwood stands by their product 100% and will make sure the customer is satisfied with every purchase. This ammunition is new production, non-corrosive, in boxer primed, reloadable nickel Plated brass cases. Nosler  Varmageddon bullets and loaded ammunition. Specifically designed to be the end of the world for any varmint in its path, this flat based bullet design delivers high velocities and extreme terminal performance on varmints at long ranges. As with all of Underwood Ammo rounds, these loads utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.