Nickel-plated brass casings, their nickel plating process provides several key benefits, not limited to but including; improved feeding in all actions of firearms enhanced corrosion resistance over traditional brass, improved cosmetics, and ease of cleanup during reloading. Nickel-plated casings will not tarnish like brass during storage or when in contact with foreign materials such as leather, moisture, and other metals.As with all of Underwood Ammo rounds, they utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.While taking advantage of their state of the art testing equipment, this high-performance ammunition is field tested using popular, real firearms that their 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.