HORNADY 300 BLK - 190 GR - SUB-X - 20 RDS/BOX
Hornady
$36.69
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Hornady
HORNADY 300 BLK - 190 GR - SUB-X - 20 RDS/BOX
The Hornady 300 Blackout 190 gr Sub-X subsonic ammunition delivers reliable expansion and pinpoint accuracy at velocities below the speed of sound, making it an exceptional choice for suppressed AR-platform rifles and dedicated 300 BLK builds.
- 190-grain Sub-X bullet engineered specifically for subsonic performance
- Patented Flex Tip insert ensures reliable expansion at low velocities
- Long grooves in gilding metal jacket promote controlled, consistent expansion
- Muzzle velocity of 1,050 fps — optimized for use with suppressors
- Lead core construction balances terminal performance with retained weight
- Boxed in 20 rounds for convenient range and field use
Who This Is For
This ammunition is ideal for hunters pursuing whitetail, hogs, or predators who rely on a suppressed 300 Blackout setup for reduced noise and recoil. It's equally well-suited for tactical shooters and competitive shooters running suppressed AR-15 or AR-pistol builds who demand consistent, quiet performance without sacrificing terminal effectiveness downrange.
Specifications
| Brand | Hornady |
|---|---|
| Caliber | 300 AAC Blackout (300 BLK) |
| Bullet Weight | 190 Grain |
| Bullet Type | Sub-X (Subsonic Expanding) |
| Muzzle Velocity | 1,050 fps |
| Muzzle Energy | ~465 ft-lbs |
| Rounds Per Box | 20 |
| Casing Material | Brass |
| Primer Type | Boxer |
| Reloadable | Yes |
| Application | Hunting, Suppressed Shooting, Tactical |
| Part Number | 80877 |
Frequently Asked Questions
Will this ammunition cycle reliably in a standard 300 Blackout AR-15 without a suppressor?
Yes, Hornady Sub-X 300 Blackout ammunition is loaded to cycle reliably in properly configured 300 BLK AR-platform rifles with or without a suppressor. However, since subsonic loads generate lower chamber pressure than supersonic loads, it is important to verify that your rifle's gas system and buffer weight are appropriately tuned for subsonic ammunition. Some rifles may require an adjustable gas block or a lighter buffer spring for consistent cycling with subsonic rounds.
How does the Sub-X bullet expand at subsonic velocities?
Hornady's Sub-X bullet combines three key design elements to ensure reliable expansion at 1,050 fps and below: a patented Flex Tip insert seated inside the hollowpoint cavity initiates expansion upon impact, long relief grooves in the gilding metal jacket allow the bullet to peel back in a controlled manner, and the flat ogive profile promotes a consistently stable wound channel. Together, these features deliver the kind of terminal performance that typical hollowpoint bullets — designed for supersonic velocities — often fail to achieve at subsonic speeds.
Is this ammunition suitable for hunting, and what game is it appropriate for?
Hornady 300 BLK 190 gr Sub-X is well-suited for hunting medium-sized game including whitetail deer, feral hogs, and coyotes at ethical subsonic ranges, typically within 100–150 yards. The expanding Sub-X bullet is designed to deliver sufficient energy transfer and controlled expansion for clean, humane kills. Always confirm local hunting regulations regarding ammunition type and caliber restrictions before heading afield.
- Caliber:
- 300 BLK
- Bullet Weight:
- 190 GR
- Bullet Type:
- Sub-X
- Type:
- Rifle Ammunition
- Box Quantity:
- 20
- Case Quantity:
- 200
- Lead Free:
- No
