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Home/Shop/Ammo/.300 Blackout Ammo

.300 Blackout Ammo

Shopping for .300 Blackout ammo online? The Mag Shack has you covered. Whether you’re running subsonic loads through a suppressed SBR or high-velocity rounds for hunting and home defense, we’ve got the right 300 BLK ammo for your setup.

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Ammo Inc .300 Blackout 150gr FMJ Ammo
20-Round
500-Round
Ammo Inc .300 Blackout 150gr FMJ Ammo
5 reviews
$16.99
20 rounds / $0.85 per round
$339.99
500 rounds / $0.68 per round
Out of stock
hornady 300 blackout ammo
20-Round
200-Round
Hornady Subsonic .300 Blackout 190gr Sub-X Ammo
3 reviews
$27.99
20 rounds / $1.40 per round
$269.99
200 rounds / $1.35 per round
Magtech Tactical .300 Blackout 200gr FMJ Subsonic Ammo
50-Round
1000-Round
Magtech Tactical .300 Blackout 200gr FMJ Subsonic Ammo
$35.99
50 rounds / $0.72 per round
$699.99
1000 rounds / $0.70 per round
Out of stock
Sig Sauer 300 blackout ammo
20-Round
500-Round
Sig Sauer Elite Ball .300 AAC Blackout 125gr FMJ Ammo
2 reviews
$19.99
20 rounds / $1.00 per round
$449.99
500 rounds / $0.90 per round
Out of stock
S&B .300 Blackout 124gr FMJ Ammo
20-Round
1000-Round
S&B .300 Blackout 124gr FMJ Ammo
$14.99
20 rounds / $0.75 per round
$699.99
1000 rounds / $0.70 per round
Out of stock
Winchester Super Suppressed .300 Blackout 200gr OT Subsonic Ammo
20-Round
200-Round
Winchester Super Suppressed .300 Blackout 200gr OT Subsonic Ammo
3 reviews
$17.99
20 rounds / $0.90 per round
$169.99
200 rounds / $0.85 per round
Out of stock
Sig 300 blackout ammo
20-Round
500-Round
Sig Sauer .300 AAC Blackout FMJ 220gr Subsonic Ammo
1 review
$25.99
20 rounds / $1.30 per round
$629.99
500 rounds / $1.26 per round
Out of stock
Ammo Inc stelTH .300 Blackout 200gr TMC Ammo
20-Round
200-Round
Ammo Inc stelTH .300 Blackout 220gr TMC Ammo
3 reviews
$19.99
20 rounds / $1.00 per round
$184.99
200 rounds / $0.92 per round
Out of stock
Magtech .300 Blackout 123gr FMJ Ammo
50-Round
1000-Round
Magtech .300 Blackout 123gr FMJ Ammo
2 reviews
$33.99
50 rounds / $0.68 per round
$659.99
1000 rounds / $0.66 per round
Out of stock
Federal American Eagle .300 Blackout 150gr FMJ Ammo
20-Round
500-Round
Federal American Eagle .300 Blackout 150gr FMJ Ammo
1 review
$20.99
20 rounds / $1.05 per round
$499.99
500 rounds / $1.00 per round
Hornady Black .300 Blackout 110gr V-Max Ammo
20-Round
200-Round
Hornady Black .300 Blackout 110gr V-Max Ammo
$27.99
20 rounds / $1.40 per round
$269.99
200 rounds / $1.35 per round
Winchester USA .300 Blackout 147gr FMJ Ammo
20-Round
200-Round
Winchester USA .300 Blackout 147gr FMJ Ammo
$14.99
20 rounds / $0.75 per round
$144.99
200 rounds / $0.72 per round
Out of stock
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FAQs

Can I shoot .300 Blackout in a .223 or 5.56 rifle?

No. While the cartridges are similar in size, they are not interchangeable. Firing .300 BLK in a .223/5.56 chamber is dangerous and can result in serious injury or damage to your firearm.

Will .300 Blackout work in a standard AR-15 magazine?

Yes, you can load .300 Blackout ammo in standard AR-15 magazines in .2235/5.56. However, we recommend purchasing magazines dedicated for .300 Blackout as they have improved internal geometry and unique identification markers.

What's the difference between subsonic and supersonic .300 Blackout ammo?

Supersonic .300 BLK travels above the speed of sound and is better for hunting or self-defense due to its higher velocity and energy. Subsonic loads are slower and quieter, especially when paired with a suppressor—ideal for tactical or stealth applications.

Is .300 AAC Blackout the same as 7.62x35mm?

Yes, they are the same.