Name: 20 Rounds of .300 AAC Blackout Ammo by Hornady Subsonic - 190gr Sub-X Polymer Tipped
Brand: Hornady
Price: 32.5 USD
Availability: InStock
Rating: 2.75 (8 reviews)

Excellent ammo
Review by Al Bundy

Value
Quality
Performance

Never had feeding issues with this ammo as described by other reviewers. In my DD ISR it was most accurate and quiet. Kudos to Hornady. (Posted on 5/12/2026)

Expensive but good
Review by Eraser

Quality
Performance
Value

This round is accurate, quiet and hits hard. I had zero feed issues using a bolt action riffle. Just make sure all rounds are properly inserted into mags. A couple good taps onto your knee will get the rounds in a row. (Posted on 7/3/2025)

Good bullet, terrible powder
Review by Rjrandy96

Quality
Performance
Value

To sum it up, most accurate round in several rifles I shoot, works great on deer sized game, but leaves the nasty yellow beads all over the rifle and cause malfunctions by the second magazine, really annoyed by it because this is suppose to be a good choice for self defense snd that clearly is an issue. Not all subsonic 300 blackout loads do this. Only cheaper ones do this. (Posted on 5/21/2025)

Great Ammo, but every third round FTF
Review by Devildog45

Value
Quality
Performance

Have CMMG Banshee eats all other ammo, bought this for defense. The polymer flex tip catch's and fails to feed every second or third round, never seen anything like it with any gun / ammo. I know it's good ammo just very unreliable in my situation (Posted on 12/28/2024)

Constant feed failures
Review by Tennessee

Performance
Value
Quality

Every 3rd or 4th round fails to feed. Flat polymer tip gets caught and jams. Every other brand used cycles fine. Not a reliable ammo you can depend on in any way. (Posted on 12/15/2024)

Every round failed
Review by Starfire

Value
Quality
Performance

Contacted manufacturer. They didn't care. Every round failed. Not enough power to charge weapon. Dozens of other brands function perfectly. This is garbage. Avoid at all cost (Posted on 11/16/2024)

300 blk out 190 gr
Review by FWB

Quality
Performance
Value

When first arrived and fired, i had several feed problems and Bullets getting stuck half way out of the magazine bullet resting on the feed ramp. Also had several fails to lock open. That was using 223/556 magazines. I realized that the size of this ammo was too large for the 5.56 magazines. When i switched Magpul 300 (7.62) magazines, all of my feed problems went away and this round was extremely reliable, very accurate, and expanded beyond what i had expected. (Posted on 6/29/2024)

Cycling issues
Review by Tony

Performance
Value
Quality

These would not cycle in my AR 15 .300 blackout. Guess Ill try a different round. (Posted on 3/19/2024)

20 Rounds of .300 AAC Blackout Ammo by Hornady Subsonic - 190gr Sub-X Polymer Tipped

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