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. Nosler Ballistic Tip Hunting bullets have been trusted by hunters for nearly 25 years. They are precision made and individually inspected for the utmost quality which translates to incredible accuracy with every shot. The heavy jacket base prevents bullet deformation during firing and holds together at extreme velocities as well as a poly-carbonate tip that resists deformation in the magazine and initiates expansion upon impact. The bullet’s mid-section keeps it together at any velocity until impact, and a uniform, pure lead core eliminates possible imbalance and erratic flight caused by air pockets. As with all of Underwood Ammo rounds, these 458 SOCOM loads utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.