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Underwood Ammunition is an American manufacturer of ammunition that was founded in 1979. They produce a wide variety of handgun, rifle, and shotgun ammunition for both civilian and law enforcement use. They are known for producing high-quality, high-performance ammunition, particularly for self-defense and hunting. Underwood uses only the highest quality components, including flash suppressed powder, primers and bullets from industry-leading manufacturers such as Hornady and Sierra. They also use a unique process called “amplified reliability” which increases the reliability of the ammunition in extreme conditions. Underwood ammunition is popular among shooters and is known for its consistent performance and accuracy.