300 Blackout - 220gr - TMJ - Factory New (Subsonic)

$25.50 - $510.00

Ships in 1-5 Business Days

Developed to be Quiet and Precise

Minuteman Munitions 300 Blackout Ammo Specs:

  • Quantity: Boxes of 30rds
  • Bullet: Berrys 220gr Spire Point Total Metal Jacket or 220gr Campro (Picture May Vary)
  • Velocity: 1050ft/s from an 8.33" Barrel 
  • Casing: Factory-new. boxer-primed brass

Minuteman Munitions 300 Blackout Total Metal Jacket Benefits:

  • No exposed lead to create smoke during firing.
  • Does not foul the barrel with lead.
  • Keeps guns cleaner for longer periods of shooting.

Improved Design

  • Improved accuracy due to increased muzzle velocity
  • Manufactured using cleaner, faster burning powder
  • Enhanced firearm reliability

Important Notes

  • Designed to be subsonic in up to 11" barrels, it will function in longer barrels but not guaranteed to be subsonic.
  • 300 Blackout functions reliably with Pistol gas length systems.
  • Minimum of 1:7 twist required to ensure projectile stabilization. 




Write your own product review
  • 220 subs

    Posted by Carter on 27th Jul 2023

    Quality ammo, works well, no malfunctions.

  • Good to go!

    Posted by David on 17th May 2023

    Only shot 60 rounds so far but sounds great suppressed and they all went bang. Accuracy seems fine. Easy purchase good price , what's not to like?.

  • best prices and QUIET!

    Posted by Lance Bidlack on 16th May 2023

    i didnt read the wait time for shipping, which was my fault. i guess i was too excited to get as many rounds as i did for as little as i did! quiet stuff to boot through my rex can!

  • 300 Blackout - 220gr - TMJ - Factory New (Subsonic)

    Posted by Erik M Amparano on 25th Apr 2023

    Same great ammo at a great price. Appreciate doing business with Minuteman!

  • My fav .300 blk subsonic

    Posted by Brutsey on 17th Apr 2023

    This is really high quality ammo, and with the sale made the price right for me to pick up a case. I have several boxes and have never had any FTF or FTE.

  • Mini fix approved

    Posted by Trex on 25th Mar 2023

    Works great in the mini fix. Rifle doesn’t care much for hard primers and these work fantastic.

  • 300 Blackout 220 Gr TMJ Subsonic

    Posted by Charles Hoover on 16th Mar 2023

    Very impressed at how fast I got the product- shipped the same day, I received it the following afternoon. I have not had a chance to shoot any yet, but nice looking factory ammuntion, well packaged. I will definitely be ordering from minuteman ammunition again.

  • Best sbr/pistol ammo for 300 blk

    Posted by Shawn on 25th Feb 2023

    I have a 10.5" aero upper in 300 blk and I'm hitting around 1065 fps on average I wish they loaded hunting or self defense rounds aswell

  • No issues

    Posted by Jared on 23rd Jan 2023

    Ran 30 rds through a CMMG Dissent, no issues. Still waiting for my suppresser to get out of ATF jail so I can see how quiet the subs are.

  • Consistent ammo

    Posted by Dillon C on 10th Jan 2023

    Long time customer of minuteman. Ammo in all calibers has always been consistently accurate and reliable. Prices are competitive and customer service is dependable. The 220gr 300blk run flawless, group consistent, and sound great in a suppressed 9in rifle. Will be a lifetime customer.

  • Subsonic 220 GR TMJ 300 Blackout

    Posted by Chris Dickson on 16th Dec 2022

    Great ammo from a great North Carolina company. And great price. Thank you Minuteman Munitions!


    Posted by David Damon on 30th Nov 2022

    Haven't fired a shot but the ammo order communications and receipt were excellent. If the ammo performs like their service I will be back shortly. Thanks to all.

  • .300BLK Ammo

    Posted by Bruce on 27th Sep 2022

    I tried MINMAN 300BLK 220gr cartridges as they mentioned they would run 1050fps in an 8” barrel. My chrono test showed exactly that, but what was surprising was the fps variances was tiny. All my test shots came in between 1057 and 1063. I’m used to seeing easily 20 to 50 fps variance in the same box. Still more tests to run as I get time, but better consistency in velocity has to help my groups.

    Bravo MM. I like this stuff!

  • Immpressive

    Posted by Alan on 8th May 2022

    So glad I came upon minuteman munitions. Was having a hard time finding subsonic 300blk rounds. Shot them through my DDM4 PDW. I loved grouping.

  • Super nice ammo

    Posted by Cj on 11th Apr 2022

    So you want your 300 blackout to turn into a pcc? Here's your answer. These little dudes are so gentle to shoot, it feels like a 9mm pcc. Accuracy and grouping was so easy, standing, I had a range officer really impressed with holes in holes and holes touching in a 5 shot string. Wish it was cheaper but I'll buy more when the suppressor arrives.

  • Subsonic 300 Blackout

    Posted by robert cox on 20th Dec 2021

    Great ammunition for the SBR

  • 300 Blackout Subsonic (New)

    Posted by John on 13th Dec 2021

    30 rounds so far at 25 meters suppressed. Holes in Holes. Iron sights. Would by again. Glad to buy an NC made product. Moving out to 50 next.

  • 300 Blackout 220 grain

    Posted by Carl Claybrook on 13th Dec 2021

    Great ammo at a great price. Shipping was fast and no hassle. Very accurate and reliable practice and training round. Keep up the good work.

  • 300blk subsonic 220gr

    Posted by Ben on 4th Dec 2021

    Package came very quick and in quality packing. Haven’t shot them yet so I gave it a 4. I am sure it will be a 5 for sure. I also called to inquire about shipping notification. They answered right away and were very helpful. I will absolutely be ordering from these guys again.

  • 300 BLK Subs

    Posted by Kevin Karczewski on 2nd Apr 2021

    Excellent brand new brass casings. Have bought this same blackout before and really enjoyed shooting it. Fast delivery as well.

All ammunition warranty claims are handled on a case-by-case basis. In order to initiate a claim, please contact our Customer Service Department at with your ammunition lot number and the details of your issue including the firearm make and model. NOTE: If you do not have the lot number we CANNOT process your claim. Be sure to retain lot numbers in the event there is an issue with your ammo. All Minuteman Munitions ammunition is warranted against material and workmanship defects for up to one (1) year from the purchase date. During the warranty period, we will (at our sole option) repair, replace or refund the purchase price of any defective part or product covered by this warranty when it is returned by the original owner with proof of purchase. All ammunition warranty claims must have a Return Authorization (RA) number assigned before acceptance at our facility for further examination. Please DO NOT send ammunition without obtaining a RA number from our Customer Service Department. NOTE: This warranty does not cover products damaged or rendered defective due to accident, misuse, abuse, modification, water damage, neglect, reloading, improper handling or storage, or failure to follow instructions for use. To return a product, send with transportation prepaid, to: Minuteman Munitions, Inc 7610-B Canoe Rd Greensboro, NC 27409 Prices and/or specifications are subject to change without notice. Warranty only valid to original purchaser if purchased through website or authorized dealer.
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