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Hornady Subsonic .300 AAC Blackout 190 Grain Subsonic eXpanding Centerfire Rifle Ammunition
$44.80 $31.99 Save 29%
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Most Helpful Positive Review As advertised
Averaged 1000fps out of my 10" barrel, suppressed or unsuppressed, @45*F. Did not feed the next rounds unsuppressed, but did get bolt lockback. Suppressed they run flawlessly.
Most Helpful Negative Review Hornady Subsonic .300 AAC Blackout 190g
I read online reviews and watched some videos with ballistic gel and was intrigued. I ran a box of this through a Daniel Defense PDW 300. My buddy and I took turns with groups of 4 on 5 different targets. This was the worst performing round out of everything we shot that day and we were very surpris...
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Subsonic 300 blackout

by Doug, Verified Owner from OH, United States Written on April 15, 2026
They are quiet with a suppressor and closer to your target.
Pros:
  • quieter
Cons:
  • None
Best Used for:
  • Hearing Protection
Would recommend: Yes
Was it helpful to you? Yes | No

In the hunt with Mr0

by mr0, Verified Owner from TX, United States Written on January 30, 2026
Use these to kill pig/pigs. One shot one kill. Go for the kill and buy these���
Would recommend: Yes
Was it helpful to you? Yes | No

300 blackout subsonic

by Kj, Verified Owner from OK, United States Written on January 7, 2026
Very quiet no issues at all so far shot about 150 rounds so far
Would recommend: Yes
Was it helpful to you? Yes | No

not subsonic.

by Dan, Verified Owner from VA, United States Written on October 30, 2025
Well over 1100 fps not subsonic. Wish hornady could get their powder right and advertise the correct velocity for once.
Would recommend: No
Was it helpful to you? Yes | No

buyer beware these are not subsonic

by Dan, Verified Owner from VA, United States Written on October 24, 2025
Hornady just can’t get it right. These are shootings an average of 1133 fps. Don’t waste your money if you’re looking for true subs and want it quiet.
Pros:
  • NONE !
Cons:
  • None
Best Used for:
  • nothing
Would recommend: No
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Hornady Subsonic .300 AAC Blackout 190 Grain Sub expanding Ammo

by mark, Verified Owner from NC, United States Written on October 24, 2025
This is one of my favorite rounds. Optics Planet and their great deals is the place to shop, I have been very happy making my purchases with them, orders have been on time and I have have great communications thru them, also the shipping has been great as well.
Pros:
  • great customer service
  • Great Ammo and a Great price
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Hornady Subsonic 300 AAC Blackout 190 Grain Subsonic

by Joe, Verified Owner from TX, United States Written on September 13, 2025
Hornady Subsonic .300 AAC Blackout 190 Grain Subsonic shoots .5 MOA with my 300 BO at 100 yrds. It’s amazing how quiet it is. Going to use for hog hunting. Will definitely purchase again.
Would recommend: Yes
Was it helpful to you? Yes | No

Accurate and quiet

by Alex, Verified Owner from TX, United States Written on September 5, 2025
Excellent ammo in any way. No issues. I can’t comment on penetration, bleeding and damages within a body. Sorry
Would recommend: Yes
Was it helpful to you? Yes | No

Learning Curve

by rampdoc, Verified Owner from TX, United States Written on August 30, 2025
Shooting with a 16-inch barreled AR. Supers in the 150-grain range can be zeroed at 100 yards. These 190-grain Hornady Subs with a good suppressor will drop 6-inches at 100 yards. Quiet, consistent performance and low recoil. Beyond 110 yards, any slow heavy grained subs drop like rocks. Recalibrate, adjust your scope and mortar lob subs out past this distance. Note: Deer can and do jump the twang of a bowstring. They also jump the unnatural and sonic moving sound of the ‘poof’ from a suppressor in the very still and quiet countryside. Ask me how I know when the 4-point jumped, turned and walked back into the heavy brush 113-yards from me. Amax and various designed projectiles for 300 Blackout, create 30 caliber pencil holes straight through and through deer and hogs. They keep on running away leaving long sporadic blood trails. Keep your shots within 80 yards and these suppressed Hornady SubX projectiles will slap them happy off their feet. Very pleased with the Hornady Subsonic 300 AAC blackout ammo. Purchase on sale and fast shipping with Optics Planet. Thank You.
Would recommend: Yes
Was it helpful to you? Yes | No

weird yellow stuff

by Ryan Spear, Verified Owner from MD, United States Written on April 29, 2025
Left a lot of unburned powder I assume.. looks yellow. Not sure if that’s normal since this is my first time shooting subs. Definitely substantially quieter obviously
Would recommend: No
Was it helpful to you? Yes | No
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