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If you've got a 460 Rowland conversion, you're stepping into some real territory. You've got a semi-auto that hits like a .44 Magnum, and this Underwood load is built to make that potential count. The UA 629 gives you a 255-grain hard cast flat nose moving at 1300 fps, delivering 957 foot-pounds of energy. That's the kind of ballistics you want when you're serious about hunting or backcountry work.
Hard cast flat nose bullets don't expand, which means penetration is the name of the game. The flat face crushes through bone and dense tissue better than a round nose ever could, while that hard alloy construction resists deformation so you're getting reliable performance through whatever medium you're shooting into. With hunting applications in mind, these rounds come with Black Cherry polymer coating that cuts down on lead fouling and keeps your barrel cleaner between sessions.
The cases here are nickel-plated brass, which matters more than you might think if you're actually using this ammo. Nickel has lower friction than plain brass, so feeding is smoother and extraction is easier even if your chamber isn't immaculate. Better yet, nickel resists corrosion, so if this box spends a season in your pack or truck, the ammo stays reliable. For reloaders, these cases chamber and eject more smoothly through dies too.
At 1300 fps and 957 ft-lbs, this sits right in the middle of what makes the 460 Rowland special. The cartridge was designed to deliver .44 Magnum ballistics from a platform that's lighter and faster to reload than a revolver. A 255-grain hard cast projectile in this velocity range is proven for medium to large game out to typical hunting ranges. The flat nose design keeps that bullet stable in flight and gives you clean energy transfer where it counts.
You get 20 rounds per box, so you're working with the standard box format. The ammo is new production, non-corrosive, and packaged in reloadable brass cases. If you're stocked with a 460 conversion and actually hunting or doing serious work with it, these rounds live up to what the caliber promises.
Weight changes the terminal performance. The 255-grain hard cast prioritizes penetration and bone-crushing energy, making it better suited for larger game and brush situations. Lighter loads like 185 or 230-grain options push faster velocities but sacrifice some of that crushing power. For medium to large game hunting, the extra grain weight gives you deeper, more reliable penetration.
Yes, nickel-plated brass is reloadable. The nickel plating does make the cases slightly more brittle than plain brass, so inspect each case carefully before reloading and pay close attention during resizing. The smoother surface actually helps with die flow, but plan on getting fewer reload cycles compared to standard brass before cases start showing wear.
It's less common than mainstream calibers like 9mm or 45 ACP, but specialty ammo makers like Underwood have stepped up support for the platform. Your best bet is ordering online rather than hoping to find it on local shelves. Buying in bulk when you find quality loads like this is smart practice for a less mainstream caliber.
You need a 460 Rowland conversion kit installed in your firearm. The most common conversions are for 1911s and certain Glocks chambered in 45 ACP. The longer case prevents accidental loading in standard 45 ACP guns. Make sure your conversion kit is properly installed and your firearm can handle the higher pressure before loading up with any 460 round.
| Caliber/Gauge | 460 Rowland |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 1.95 |
| Grains | 255 gr |
| Manufacturer | |
| Manufacturer Part Number | 629 |
| Units per Box | 20 |
| UPC | 816874021924 |
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