Hornady .300 Blackout 190 gr SUB-X® Subsonic rifle ammunition is a factory-loaded cartridge chambered in .300 AAC Blackout. This round employs a 190 grain SUB-X® bullet, a heavy projectile optimized for subsonic velocities and reliable terminal performance at slower speeds. The SUB-X® bullet design features a polymer tip and bonded jacket for controlled expansion and enhanced weight retention even at subsonic impact velocities.
This ammunition is manufactured to Hornady’s quality standards with precision component assembly to provide consistent performance in rifles and AR-pattern pistols chambered in .300 AAC Blackout where subsonic performance is desired.
Key Features:
• Caliber: .300 AAC Blackout
• Bullet Weight: 190 gr
• Bullet Type: SUB-X® bonded subsonic
• Designed for Subsonic Performance and Reliable Expansion
• Factory Loaded Rifle Ammunition
Manufacturer Specifications:
Caliber: .300 AAC Blackout
Bullet Weight: 190 gr
Bullet Type: SUB-X® bonded subsonic
Product Number: 80737
Ammunition Type: Factory Loaded Rifle Ammunition
FAQ:
Q: What bullet type is used in this ammunition?
A: The load uses a 190 grain SUB-X® bonded bullet designed for subsonic performance.
Q: What chambering is this ammunition for?
A: .300 AAC Blackout.
Q: Is this factory loaded?
A: Yes — this is factory loaded Hornady ammunition optimized for subsonic use.
Brought to you by Black Bayou Armory.






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