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When deep penetration is your priority, Underwood's 220-grain Xtreme Penetrator stands apart from conventional expanding ammunition. The solid copper monolithic bullet uses Lehigh Defense's proven design with a precision-engineered nose cavity that works differently than hollow points. Instead of expanding, it channels hydraulic forces to create a larger permanent wound cavity while driving straight through barriers like hide, bone, and heavy muscle. This makes it exceptional for situations where barrier penetration matters.
The bullet itself is entirely lead-free copper, precision CNC machined with cutting edges that prevent deflection. At 220 grains, it's heavy-for-caliber in the .44 Magnum, giving you significant sectional density to maintain velocity through tough material. The blunt nose profile facilitates reliable feeding in both revolvers and lever-action rifles while delivering initial energy transfer at impact. The nickel-plated Ducta-Bright 7a brass cases use modern plating that won't embrittle during reloading cycles, even under the high pressures of magnum loads.
Muzzle velocity runs 1530 fps with muzzle energy of 1144 foot-pounds. This is standard pressure ammunition that's safe for any properly maintained .44 Magnum firearm. Underwood field-tests their loads in real firearms under real-world conditions, not just laboratory setups with extended barrels. The flash-suppressed powder helps preserve your vision if you ever need these rounds in low-light situations.
Each box contains 20 rounds ready to shoot or reload. The nickel plating doesn't tarnish like traditional brass and resists corrosion from moisture and storage exposure. If you reload, these cases offer good longevity thanks to their modern plating process. This ammunition works in .44 Magnum revolvers and lever-action carbines alike, though Underwood recommends using steel-frame revolvers rather than lightweight alloy frames due to the magnum recoil impulse.
It's a solid copper bullet that doesn't expand like a hollow point. Instead, the precision-engineered nose design creates hydraulic pressure spikes that form a large permanent wound cavity while penetrating straight through without deflection. This design makes it excel at barrier penetration where conventional expanding bullets would fragment or stop.
Yes. Underwood uses Ducta-Bright 7a nickel plating specifically engineered for magnum pressures without embrittling the brass like older plating processes. The modern process maintains case integrity through multiple reloading cycles. However, like all ammunition reloading, you should use proper equipment and follow safe practices.
This ammunition is designed and marketed for hunting and self-defense applications. The deep-penetrating characteristics make it particularly suitable for medium to large game where barrier penetration might be a factor. Always check local hunting regulations and ensure your firearm is appropriate for your intended use.
The Xtreme Penetrator prioritizes deep, straight-line penetration over expansion. Most factory hunting ammo uses expanding bullets for rapid energy transfer on game, while this solid copper design drives deeper through tougher material. It generates over twice the penetration of most expanding bullets according to manufacturer specs, making it a specialized choice for specific situations.
| Caliber/Gauge | .44 Magnum |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 3.00 |
| Grains | 220 gr |
| Length | 3.2000 |
| Manufacturer | |
| Manufacturer Part Number | 841 |
| Shipping Weight | 1.08 |
| Units per Box | 20 |
| UPC | 816874020279 |
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