Underwood .357 Sig 90gr Xtreme Defender Ammunition

Underwood .357 Sig 90gr Xtreme Defender

Underwood Ammunition's Xtreme Defender line represents a serious approach to personal protection ammunition. This .357 Sig loading features a 90-grain copper solid projectile—a monolithic design that delivers consistent performance and deep penetration.

Key Features

• Caliber: .357 Sig
• Bullet Weight: 90 grains
• Bullet Type: Copper solid (monolithic)
• Packaging: 20 rounds per box, 10 boxes per case (200 rounds total)
• Purpose: Self-defense and duty use

Performance Characteristics

The copper solid construction eliminates jacket separation and ensures reliable expansion. This design is particularly valued by those who demand consistent, predictable ballistic performance in critical situations. The .357 Sig cartridge itself offers a favorable balance of velocity, energy, and controllability in modern defensive pistols.

Ideal For

Shooters seeking premium defensive ammunition with proven reliability. Whether you're training for self-defense or carrying for personal protection, Underwood's Xtreme Defender ammunition is engineered to perform when it matters most.