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Underwood paired Hornady's respected XTP bullet design with their own carefully formulated loads to create a .44 Magnum round that handles both hunting and field use without compromise. The 300-grain weight gives you serious penetration while the XTP hollow point design promotes controlled expansion, so you get reliable performance across a range of game and conditions.
The heavier bullet weight makes this load ideal for bigger game and longer-range work where that extra mass helps maintain velocity and energy downrange. At 1300 fps from the muzzle, the 300-grain XTP is built to expand reliably even at moderate velocities, which matters when you're shooting from revolvers with shorter barrels. The bullets themselves feature a tapered copper jacket and uniform core density that work together to deliver the kind of expansion and penetration hunters have trusted for decades.
Each round comes loaded in nickel-plated brass that won't corrode or tarnish during storage the way standard brass can. The plating also improves feeding reliability across different firearms and makes cleanup easier if you reload. Underwood uses flash-suppressed powder throughout this line, which matters if you ever need to use your gun in low-light situations where a bright muzzle flash could compromise your vision. The ammunition is boxer-primed and fully reloadable, so handloaders can get multiple uses from the brass.
You get 20 rounds per box, which aligns with standard .44 Magnum packaging. Underwood manufactures this ammunition fresh as new production with non-corrosive primers, so you don't have to worry about corrosive residue building up in your barrel. The whole load is built within SAAMI specifications, making it safe to use in any properly functioning .44 Magnum revolver rated for standard pressure loads.
The XTP design is built to expand reliably even at moderate velocities, so it works from both short and longer barrels. A 4-inch revolver barrel will still provide adequate velocity for expansion, though a 6-inch barrel or longer gives you more performance. If you're shooting this from a lever-action rifle, you'll get noticeably higher velocity and energy.
The 300-grain XTP is a solid choice for medium-sized game like deer and performs well on larger animals too. The heavier bullet provides deep penetration, and the controlled expansion of the XTP design helps maintain energy on thicker-bodied game. Shot placement remains the most important factor regardless of cartridge choice.
This ammunition is loaded within standard SAAMI specifications, so it functions safely in any properly maintained .44 Magnum firearm. However, keep in mind that heavier loads produce more recoil, which can be punishing in lightweight titanium or scandium-frame revolvers. Steel-framed guns are the preferred platform for managing the recoil impulse.
Yes, the boxer-primed brass cases are fully reloadable. The nickel plating provides corrosion resistance during storage and handling, won't tarnish from contact with leather or moisture the way standard brass does, and improves feeding reliability in some firearms. It also makes the cases easier to clean during the reloading process.
| Caliber/Gauge | .44 Magnum |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 1.50 |
| Grains | 300 gr |
| Length | 3.2000 |
| Manufacturer | |
| Manufacturer Part Number | 328 |
| Units per Box | 20 |
| UPC | 816874020941 |
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