Underwood Ammo rounds, utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use firearms in low light. Nickel-plated brass casings, the 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.