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 brass cases.The development of the Lehigh Controlled Chaos technology was the result of an animal control agency's request for a no lead .243 bullet that would provide extensive wound trauma with little minimal pass through energy. Basically the idea was to burst the bullet into numerous particles at a predetermined depth creating many wounds and a large temporary cavity with shot placement at or near the central nervous system. The agency had tried copper matrix frangible...