The Underwood Ammo 452 Maximum Expansion 300 Blackout 194gr Solid Monolithic cartridge is engineered around Lehigh’s proven Maximum Expansion technology, pairing a solid copper bullet with nickel-plated brass cases for reliable performance. Designed as subsonic .300 AAC Blackout ammunition, it delivers controlled expansion and consistent terminal performance while remaining suppressor friendly.

This load is optimized for pistol-length barrels, using flash-suppressed powder to maintain velocity and reduce muzzle signature in low light. The lead-free, solid monolithic hollow point is intended for hunting medium game, varmint control, and personal protection where deep penetration and wide, petal-driven expansion in fluid mediums are desired. Underwood Ammo’s focus on precision manufacturing and innovative bullet design results in a round that balances accuracy, consistency, and dependable performance.

Key Features:

• Manufacturer: Underwood Ammo
• Model: 452 Maximum Expansion
• Caliber: .300 AAC Blackout
• Condition: New
• Bullet Type: Solid Monolithic Maximum Expansion Hollow Point
• Bullet Weight: 194 Grains
• Muzzle Velocity: 1025 Fps
• Muzzle Energy: 453 Ft Lbs
• Rounds Per Box: 20
• Boxes Per Case: 10
• Casing Material: Nickel-Plated Brass
• Lead Free: Yes
• Velocity Rating: Subsonic
• Suppressor Safe: Yes
• Application: Medium Game, Varmint, Personal protection