Underwood 300 AAC Blackout 220gr Subsonic Hollow Point - 20 Rounds

The Underwood 300 AAC Blackout 220-grain subsonic ammunition delivers maximum terminal performance while maintaining hearing-safe velocity levels. This specialized load combines a heavy boat-tail hollow point projectile with precisely measured powder charges to achieve optimal expansion and penetration in suppressed firearms.

What Makes This Different

Unlike standard supersonic loads that create sonic cracks, this subsonic configuration operates below 1,050 fps to eliminate the telltale sound signature. The 220-grain maximum hollow point (MHP) bullet features an engineered cavity design that promotes controlled expansion upon impact. Underwood's precision loading process ensures consistent velocities within 15 fps across the entire lot, delivering the reliability suppressed shooters demand.

Key Features

• 220-grain maximum hollow point boat-tail bullet for superior ballistic coefficient
• Subsonic velocity maintains sound suppression effectiveness
• Premium brass cases with consistent wall thickness for reliable extraction
• Temperature-stable powder formulation performs in extreme conditions
• Boxer-primed cases support reloading for cost-conscious shooters
• 20-round boxes packed 10 boxes per case for bulk purchasing
• Optimized for 16-inch and shorter barrel configurations

This ammunition excels in tactical applications where noise reduction is critical, hunting scenarios requiring clean kills on medium game, and competitive shooting disciplines emphasizing precision over speed. The heavy bullet weight maintains energy downrange while the hollow point design ensures rapid expansion in soft tissue. Testing demonstrates consistent sub-MOA accuracy in quality bolt-action and precision semi-automatic platforms.

Technical Specs

• Caliber: 300 AAC Blackout (.300 BLK)
• Bullet Weight: 220 grains
• Bullet Type: Maximum Hollow Point Boat-Tail
• Muzzle Velocity: 1,010 fps (16-inch barrel)
• Muzzle Energy: 498 ft-lbs
• Case Material: New brass with boxer primer
• Packaging: 20 rounds per box, 10 boxes per case
• Manufactured: United States

Underwood's commitment to quality control and consistent performance makes this the preferred choice for professionals and enthusiasts who refuse to compromise on ammunition reliability. The subsonic design paired with expanding bullet technology creates an ideal balance of stealth and stopping power.