Underwood Xtreme Penetrator .480 Ruger Ammo – 300 Grain Solid Fluted Backcountry Defense Rounds (20 Round Box)

Underwood Xtreme Penetrator .480 Ruger 300 Grain ammunition is a premium big-bore revolver load designed for shooters who demand maximum penetration, extreme stopping power, and advanced projectile performance in serious outdoor environments. Built for hunting and backcountry defense, this load delivers the uncompromising reliability and terminal effectiveness Underwood is known for.

Loaded with a 300 grain Xtreme Penetrator solid projectile, this round features a patented fluted nose design engineered to drive deep, straight-line penetration while creating effective energy transfer—without relying on hollow point expansion. This makes it an outstanding choice for protection against large predators and for hunting situations where penetration through heavy bone and dense muscle is critical.

Chambered in the powerful .480 Ruger cartridge, this ammunition is optimized for modern big-bore revolvers and delivers devastating terminal performance in demanding field conditions. Packaged in a convenient 20-round box, it’s an excellent option for outdoorsmen and revolver users seeking serious penetration and big-bore authority.

Quick Highlights

• Caliber: .480 Ruger

• Bullet Weight: 300 Grain

• Bullet Type: Solid Fluted Xtreme Penetrator

• Intended Use: Backcountry Defense / Big Game Hunting

• Rounds Per Box: 20

• Manufacturer: Underwood Ammunition

Use Cases & Applications

• Backcountry defense against large predators

• Big game hunting with .480 Ruger revolvers

• Deep penetration performance on tough targets

• Outdoor carry for serious revolver platforms

• Barrier-capable solid projectile applications

Technical Details

• Manufacturer: Underwood Ammunition

• Product Line: Xtreme Penetrator

• Caliber: .480 Ruger

• Bullet Weight: 300 Grain

• Projectile Type: Solid Fluted Penetrator

• Rounds per Box: 20

• Application: Hunting / Backcountry Defense Ammunition

Ammunition Sales Notice: By purchasing ammunition from RJ Whited LLC, you certify that you are legally permitted to purchase and possess ammunition under all applicable federal, state, and local laws. You must be at least 18 years of age to purchase rifle or shotgun ammunition and at least 21 years of age to purchase handgun ammunition. It is the buyer’s responsibility to know and comply with all laws and restrictions in their jurisdiction. We will not ship ammunition to locations where it is prohibited. All ammunition sales are final.