Remington Ammunition R21346 .300 AAC Blackout 190 Grain Speer Impact - 20 Rounds

The Remington R21346 .300 AAC Blackout 190 Grain Speer Impact ammunition is purpose-built for shooters who demand precision and terminal performance in a subsonic rifle round. This 20-round box pairs Remington's quality brass and primers with Speer Impact bullets engineered for controlled expansion and consistent energy transfer—ideal for hunting, suppressed rifle systems, and shooters working within the .300 Blackout's effective range.

The 190-grain Speer Impact bullet uses impact bonded construction, where the jacket and core are chemically fused to minimize separation on impact and maximize retained weight and energy delivery into your target. The aerodynamic boat-tail design and Slipstream polymer tip work together to improve ballistic performance and support expansion across a spectrum of velocities—a real advantage in subsonic loads where velocity varies more than in magnum cartridges. This is ammunition built to perform when precision matters.

Remington combines these bullets with match-grade components—their own primers and propellants selected for consistency across different shooting conditions. Whether you're running a suppressed AR or a bolt gun in .300 Blackout, this load delivers the accuracy and terminal behavior serious shooters expect from a premium offering in this caliber.

Key Features

• Impact bonded bullet construction for reliable performance and maximum weight retention
• Boat-tail design with rear-adjusted center of gravity for improved flight and accuracy
• Slipstream polymer tip for consistent expansion across velocity ranges
• Remington primers and propellants chosen for environmental consistency
• 20-round box for convenient tracking and inventory

Specifications

Frequently Asked Questions

What is .300 AAC Blackout ammunition used for?

.300 Blackout is a subsonic rifle cartridge commonly used in AR-pattern rifles, bolt guns, and suppressed systems for hunting and sport shooting. The 190-grain weight in this load is typical for subsonic applications where velocity is kept below the sound barrier.

Will this ammunition work in my .300 Blackout rifle?

Yes, this ammunition is loaded in standard .300 AAC Blackout (also called 300 BLK) specification and will function in any rifle or upper receiver chambered for that cartridge. Always verify your firearm's chambering before loading.

What's included in the box?

Each box contains 20 rounds of loaded ammunition ready to shoot—no components or reloading materials included.

Is this ammunition suitable for hunting?

Yes. The Speer Impact bullet design is intended for game use, with bonded construction and controlled expansion characteristics. Verify your local hunting regulations and ensure the .300 Blackout and 190-grain load meet the requirements for your intended game and hunting method.