300 Blackout Ammo For Sale
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Magtech First Defense 300 Blackout Ammo - 500 Rounds of 123 Grain FMJ Ammunition
$399.99
$369.99
57 In stock now
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Magtech 300 Blackout Ammo - 50 Rounds of 123 Grain FMJ Ammunition
$39.9977 In stock now
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Hornady Frontier 300 AAC Blackout Ammo - 200 Rounds of 125 Grain FMJ Ammunition
$164.9969 In stock now
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Hornady Frontier 300 AAC Blackout Ammo - 20 Rounds of 125 Grain FMJ Ammunition
$18.49146 In stock now
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Hornady 300 Blackout Ammo - 200 Rounds of 190 Grain Subxonic Polymer Tipped Ammunition
$314.99
$289.99
88 In stock now
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Black Hills Ammunition 300 AAC Blackout Ammo - 20 Rounds of 125 Grain OTM Ammunition
$31.997 In stock now
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Hornady Subsonic 300 Blackout Ammo - 20 Rounds of 190 Grain Polymer Tipped Ammunition
$32.9993 In stock now
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Overview of 300 Blackout Ammo
Advanced Armament Corporation and Remington Defense developed the 300 Blackout in 2010 for increased terminal performance over the 5.56 NATO while maintaining the same rifle platform and magazine capacity.
It has become a favorite of carbine shooters worldwide.
What are the most popular 300 Blackout brands you sell?
For heavy subsonic loads, explore our selection of 300 Blackout 220 Grain Ammo ideal for suppressed shooting. If you’re deciding between grain weights for hunting, defense, or suppressed use, read the best grain for 300 Blackout guide.
You can filter our entire selection using the left sidebar to see which brands we currently have in stock and available using the Manufacturers filter. You can also filter by attributes such as Bullet Type, Bullet Weight, Casing Type, and Primer Type to find what you need.
What Is Subsonic 300 Blackout Ammo and Why Use It?
Subsonic 300 Blackout ammo is engineered to travel below the speed of sound (approximately 1,100 feet per second), making it significantly quieter than supersonic alternatives, especially when paired with a suppressor. Subsonic 300 BLK rounds are typically heavier, with common options like 220 grain 300 Blackout loads providing excellent energy transfer at close range with reduced recoil and noise.
Designed with stealth and comfort in mind, subsonic 300 BLK is a top choice for suppressed shooting, home defense, and hog hunting in close-quarters environments. The heavier bullets retain momentum well, and while they sacrifice some long-range performance, their quiet operation makes them ideal for tactical use or backyard shooting where sound control matters. Shooters running a bolt-action instead of an AR can get to the same place with subsonic 308 ammo, which uses a 200 grain bullet at roughly 1,050 fps.
If you're deciding between subsonic and supersonic options, or want a breakdown by use case, check out our full guide on the best subsonic 300 Blackout ammo. You can also explore the 300 Blackout ballistics to compare how different loads perform in terms of velocity, energy, and drop. For our top picks across home defense, hunting, subsonic, and range use, see our guide to the best 300 Blackout ammo.
Best 300 Blackout Ammo for Specific Uses
| Use Case | Details |
|---|---|
| Best 300 BLK Ammo For A 7.5" Barrel | Best Overall: Barnes Precision Match 125 grain. Runner-Up: Black Hills 110 grain TTSX. |
| Best 300 BLK Ammo For Hog Hunting | Best Overall: Barnes VOR-TX 110 grain TAC-TX FB. Runner-Up: Hornady Subsonic 190 grain Sub-X. |
| Best 300 BLK Subsonic Ammo | Best Overall: Hornady Subsonic 190 grain Sub-X. Runner-Up: Nosler 220 grain Ballistic Tip. |
You can also check out our in-depth look at 300 Blackout ballistics from all of the popular ammo manufacturers if you're in search of ballistics data for your favorite factory 300 BLK load.
Customer Reviews
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TINKER said:
Shoots great through my master piece MPA300BLK, This is a clone of a ar18/180, No rtf or eject, could cover 3 shots at 50 yards with a half dollar
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Mr. Phox said:
Not my first box of Ammo from Red Mountain Arsenal but my first time ordering on Ammo.com and I am Blown away with the speedy delivery (3-4 days after order)!! Thank you I have found my gold mine LoL!! Thank you Guys you’ll be hearing from me again, SOON!!
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Harold said:
Flawless with my two boxes. I got a very tight shot group and performed very well (AR-15 PSA 300BLK Pistol 8.5 inch / 1:8) Box says match grade but due to the shortage of ammo just about everywhere, I had nothing to compare it to. Box says "veteran owned" and that makes me happy - 100% in on that that you're one of us. Price might be a tad high but just not that significant - more important to have it. Nice ammo and would buy again.
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Curtiss said:
Purchased several boxes of ammo and regret the purchase. Several if their bullets separate leaving the bullet tips in the barrel and casing gets ejected leaving gun powder everywhere. I do not recommend this ammo
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Bird dog said:
Love them
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Just me said:
My lady and I love PSA RIFLES! We had a hard time finding accureet ammo that ran through psa 16" .300 blk out upper but this ammo is flawless and got my 13 yr old son his first youth hunt deer that didn't go more than 40 yards!! Amazing ammo with our set up !!!
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Ricrok said:
Went through all 200rnds and it shot well and fed consistently. Can't ask for more than that.
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wpro said:
nice tight group, never any problems, use it in a 20in and 10in barrel, same group patterns in both guns. for the performance of the ammo and never any problems I only use magtech
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Big T. said:
This is my second purchase of this ammo. The first purchase was 60 rounds. I had a great time zeroing and shoot the rifle suppressed. This ammo out performed my expectations. This purchase was 200 rounds for $342.00 including shipping. So $1.60 delivered to the front door was worth it to me. Happy shooting.
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RazorUSMC said:
Bought this ammo for a Run N Gun competition, it worked falsely as it should. I reload my own but with the short notice of this shoot I did not have the time to reload my own. I have some to trust Hornady products as I use there Lock N Load AP Ammo plant press. This ammo was great and was super quiet with my 10.5" SBR I will be getting some more soon so I have the brass to save this time.
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JB said:
I used these rounds a couple of weeks ago hog hunting. 2 bullets fired, 2 hogs down! 97 lbs and 104lbs. Good head shot placement. They both went down immediately, didn't even take one step.