Can a rifle cartridge that was introduced in the 1960s really be considered “old school?” Depends on whom you ask. But everyone can agree that Underwood’s addition of a high-tech Xtreme Penetrator bullet to the classic 444 Marlin is a great idea!

The Xtreme Penetrator has a whole lot of talents. Naturally, the 100% copper projectile is compliant with certain states’ hunting ammo laws, as well as incapable of depositing lead inside rifling or meat. It’s a tough bullet, too, which can easily tunnel its way to the depth where a large quarry’s most important organs lie. The Xtreme Penetrator’s terminal ballistics are even deadlier thanks to its grooved tip, which pressurizes the soft tissues it makes contact with to inflict a cavernous wound channel. And it’s flat-shooting to boot, with the .200 G1 ballistic coefficient that confers this kind of trajectory out of a 24” test barrel: 0yds: -1.5” → 100yds: 2.8” → 200yds: 0.0” → 300yds: -13.1” → 400yds: -41.7” → 500yds: -93.0”.

Underwood sets up the Xtreme Penetrator for success by seating it in a premium nickel-plated brass case and above a payload of low-flash propellant. Smooth, reliable cycling. Extra corrosion resistance. Muzzle flash that won’t temporarily blind you at night. All useful tools to the lever-action hunter!

20 Round Box

Features and Specifications:
Manufacturer Number: 554
Caliber: .444 Marlin
Bullet Weight: 220 Grains
Bullet Type: Lehigh Defense Xtreme Penetrator
Muzzle Velocity: 2660 fps
Muzzle Energy: 3457 ft/lbs
Reloadable Nickel-Plated Brass Case
20 Rounds