The Underwood 851 Xtreme Defense .32 Auto (ACP) is a purpose-built cartridge featuring a 55-grain solid copper monolithic bullet and nickel-plated brass cases. It is offered in 20-round boxes and is rated +P; listed performance includes a muzzle velocity of 1050 fps and muzzle energy of 135 ft-lbs. The cartridge design and construction prioritize consistent feeding, corrosion resistance, and barrier performance in controlled testing environments.
Key Specifications
- The caliber is .32 Auto (ACP).
- The bullet weight is 55 grains.
- The bullet type is copper solid monolithic.
- The cartridge is rated +P.
- The listed muzzle velocity is 1050 fps.
- The listed muzzle energy is 135 ft lbs.
- There are 20 cartridges per box.
- There are 10 boxes per case.
- The case material is nickel-plated brass.
- The intended application is personal defense.
Built to supply reliable feeding and consistent terminal performance characteristics, this load combines a monolithic copper projectile with nickel-plated cases for enhanced corrosion resistance and easy handling. Its specification set makes it suitable for users seeking a compact defensive cartridge option in .32 Auto (ACP).
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