Underwood Subsonic Rifle Ammunition 8.6 Blackout 300gr HPBT 950 fps 20/ct

Underwood Subsonic Rifle Ammunition in 8.6 Blackout delivers 300-grain HPBT projectiles at 950 fps, engineered for suppressed rifle systems and subsonic applications. Whether you're shooting near Redwood City or anywhere in California, understanding local regulations matters. Review California firearm laws before your purchase to ensure compliance with your setup.

Nickel-Plated Brass and Subsonic Velocity

This load pairs nickel-plated brass cases with 300-grain hollow-point boat-tail bullets designed for subsonic performance. The 950 fps velocity keeps rounds below the sound barrier when fired through suppressed platforms, reducing supersonic crack while maintaining energy downrange. Twenty rounds per box give you reliable test ammunition or practice supply. When you're ready to pick up, our team handles FFL transfer pricing transparently so you know exactly what to expect at checkout. Browse our gun shop.

Frequently asked questions

Is 950 fps velocity suitable for suppressed rifle shooting?

Yes. Subsonic loads at 950 fps stay below the sound barrier, eliminating supersonic crack when fired through a suppressor. This velocity is specifically engineered for suppressed 8.6 Blackout platforms and maintains adequate energy for target and hunting applications.

What is the bullet weight and construction?

This ammunition uses a 300-grain hollow-point boat-tail (HPBT) projectile. The heavier bullet weight contributes to the subsonic velocity while the HPBT design provides consistent ballistics and controlled expansion suitable for the 8.6 Blackout cartridge.

How long is the California firearm waiting period?

California requires a 10-day waiting period from when DROS is submitted until you can take possession of the firearm. Looking for gun shop San Jose? Visit us in Sunnyvale.