300 BLK Hornady Subsonic 190gr Sub-X Ammo For Sale

Hornady 300 AAC Blackout 190 grain Sub-X is designed for subsonic performance without sacrificing terminal effectiveness. The Sub-X bullet features Hornady's Flex Tip technology, helping it expand reliably even at lower subsonic velocities — a problem that sidelines most traditional heavy 300 Blackout projectiles.

Optimized for Suppressed Shooting

Subsonic loads like the 190gr Sub-X are commonly paired with suppressors, producing quieter shots while maintaining reliable cycling in many 300 BLK rifles. The heavy bullet weight also helps maintain stability and consistent impact at typical subsonic shooting distances. For a full look at how this round performs on paper, the 300 Blackout ballistics charts include dedicated data for the Sub-X. Shooters comparing subsonic options will also find the best 300 Blackout subsonic ammo guide useful for context.

Reliable Hunting Performance

Unlike many traditional subsonic bullets that struggle to expand, the Sub-X projectile is engineered specifically for controlled expansion at lower velocities. This makes it a practical option for hunters using suppressed 300 BLK rifles — it's a standout choice for hog hunting with 300 Blackout, where subsonic performance and quiet follow-up shots matter. For a detailed breakdown of real-world performance, see the full Hornady 300 Blackout 190gr Sub-X review.

For shooters seeking quiet performance combined with dependable terminal results, Hornady 190gr Sub-X offers one of the most capable subsonic options available. Shooters who also run supersonic loads should take a look at the Hornady Black 110gr V-Max for a fast, flat-shooting complement to this load. Stock up with bulk 300 Blackout ammo for better value on both.

Written by

Sam Jacobs