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This Underwood load pairs serious penetrating power with practical execution. The 180-grain hard cast flat nose bullet sits on the heavier end of the magnum spectrum, delivering 784 ft-lbs of muzzle energy at 1400 feet per second. That velocity and mass work together for consistent, deep penetration through medium to heavy game—the kind of performance you want when the stakes are real.
Underwood's Black Cherry polymer coating is the standout here. It prevents lead from contacting the bore, which means you get less fouling buildup with each round fired. This coating handles thermal stress better than previous generations, resisting gas cutting while maintaining excellent wear resistance. The result is a cleaner barrel that shoots more accurately over extended sessions, plus easier cleanup when you get home.
The gas check serves a critical purpose in hard cast ammunition. It seals the bullet base against high-pressure combustion gases, preventing gas cutting and barrel leading—problems that come standard with soft lead bullets at magnum velocities. The gas check also helps the bullet grip the rifling more effectively, which supports better accuracy downrange.
Each box contains 20 rounds of nickel-plated brass that's boxer-primed and reloadable. Underwood also loads this with flash-suppressed powder, meaning your night vision doesn't take a hit if you need to shoot in low light. The ammunition is new production, non-corrosive, and field-tested in real firearms that people actually own.
The gas check is a copper cup fitted to the bullet's base that creates a seal against high-pressure combustion gases. This prevents gas cutting of the barrel and reduces lead fouling—common problems with soft lead bullets fired at magnum velocities. It also helps the bullet grip the rifling better, which supports improved accuracy.
Yes. The 180-grain hard cast flat nose design is specifically engineered for deep penetration through dense muscle and bone. With 784 ft-lbs of energy and consistent 1400 fps velocity, this load delivers reliable performance on deer-sized game and is a proven choice for hunters who prioritize penetration over expansion.
Absolutely. The nickel-plated brass is reloadable and boxer-primed. Nickel plating actually offers some advantages for reloaders—it resists tarnishing during storage and cleans up easier than plain brass. However, make sure you're using quality reloading equipment rated for magnum pressures.
The Black Cherry coating is a polymer compound that prevents direct contact between the lead bullet and the bore, virtually eliminating lead fouling buildup. It also provides excellent wear and abrasion resistance, handles thermal stress from high-velocity firing, and produces minimal smoke during shooting. This means cleaner barrels and better accuracy over multiple shots.
| Caliber/Gauge | .357 Magnum |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 2.15 |
| Grains | 180 gr |
| Length | 2.7000 |
| Manufacturer | |
| Manufacturer Part Number | 720 |
| Shipping Weight | 0.81 |
| Units per Box | 20 |
| UPC | 816874022051 |
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