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If you've invested in a suppressor, you need ammo that actually delivers on the quiet promise. Remington's Subsonic .300 AAC Blackout ammunition was developed through a collaboration with Advanced Armament Corp specifically to maximize what your suppressor can do. At 940 fps, this load stays well below the sound barrier, which means no supersonic crack—just the mechanical action of your rifle. That's the difference between a truly quiet setup and one that still rings your ears.
The heavy 220-grain bullet is central to how this round works. At subsonic velocities, heavier projectiles carry the momentum needed for consistent cycling and reliable performance while maintaining that low velocity. The Open Tip Flat Base (OTFB) design keeps the ballistics clean, and just as important, it eliminates exposed lead on the bullet's heel. This design detail matters if you run a suppressor regularly—exposed lead can foul suppressor ports over time, and this round was engineered to prevent that. You're also getting clean-burning powder that leaves less residue in your barrel and suppressor baffles.
Tight velocity control is what separates a purpose-designed subsonic load from other options. Remington engineered this ammunition to eliminate velocity variance that could push rounds into transonic territory and create the unpredictable flight issues that come with it. The brass cases are reloadable, and everything cycles reliably in modern AR-platform rifles chambered in .300 AAC Blackout. Target shooters and suppressed training courses both benefit from the consistency here.
This is target and training ammunition, and it delivers the kind of quiet, controllable performance that makes extended range sessions with a suppressor actually enjoyable.
Yes, Remington Subsonic .300 AAC Blackout will function reliably in any .300 AAC Blackout rifle whether it has a suppressor or not. That said, you won't experience the full benefits of the subsonic design without one. The real value of this load shows up when paired with a suppressor, where it delivers genuinely quiet performance without the sonic crack.
The Open Tip Flat Base design eliminates exposed lead on the bullet's heel, which prevents lead buildup in suppressor ports and baffles. Over extended shooting, this reduces fouling and keeps your suppressor cleaner. The design also promotes excellent accuracy and stability at subsonic velocities, giving you reliable performance downrange.
Yes. The brass cases are Boxer-primed and fully reloadable. If you reload for .300 Blackout, you can recycle these cases multiple times, which helps offset the cost of subsonic ammunition over time. Just ensure your reloading setup accounts for subsonic velocities and powder selection.
Subsonic loads carry inherently arching trajectories. Expect roughly 100 inches of drop at 300 yards with standard setup. This is why subsonic .300 Blackout is best suited for closer-range applications where you can hold over or use a suppressed-specific zero. For precise holdover calculations, always test your rifle's actual performance, as barrel length and suppressor effects vary.
| Caliber/Gauge | .300 AAC Blackout |
|---|---|
| Case Material | Brass |
| Cost per Round | 1.70 |
| Grains | 220Gr |
| Manufacturer | |
| Manufacturer Part Number | 28430 |
| Model | |
| Product Type | Open Tip Flat Base |
| Shipping Weight | 1.0 |
| Units per Box | 20 |
| UPC | 047700479903 |
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