Underwood Ammo standard Jacketed Hollow Point rounds are unrivaled. We use the Sierra Bullets projectiles which feature skives designed to create a versatile handgun bullet for use in a variety of applications. The deep skives enhance the expansion characteristics of the bullet without sacrificing accuracy and reliable feeding. The skives in the jacket mouth create precise reliefs in the jacket which allow for rapid consistent reliable expansion. This reliable expansion assures energy transfer and stopping power while limiting the likelihood of over-penetration. 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.