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 cases.   The Nosler AccuBond represents the most advanced bonded core bullet technology to date. Through a proprietary bonding process that eliminates voids in the bullet core, AccuBond marries Nosler's traditional copper-alloy jacket with its special lead-alloy core. The result is a bullet that flies true, penetrates deep, won't cause extensive barrel fouling, and will retain 60-70% of its weight. The polymer tip helps protect against deformation while initiating expansion upon impact.