All Orders will ship within 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
  • 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.

  • Works Great

    Posted by Dave Allison on 29th Mar 2021

    Just purchased a 300 Blackout pistol. About to start the process to get a suppressor and wanted to see if the subs would run with out it. They did! Well made ammo at a reasonable price for the times.

  • .300blk subs

    Posted by Taylor W on 26th Mar 2021

    Clean reliable shooting ammo. Shipped super fast. Will continue to purchase!

  • 300 BLK 220g

    Posted by "Jesse" on 31st Oct 2020

    This is great ammo, after hundreds of rounds no misfires, no squibs, and reliable accuracy.

  • Subsonic 300BLK

    Posted by Russ King on 31st Aug 2020

    This is a local company that produces a great product. MOA thru my DDMV4 at 50 yds was .6” Great burn, no misfires thru 300 rounds. Would definitely recommend. Just need more!!!

  • 300 Blackout 220gr subsonic

    Posted by Matthew on 13th Aug 2020

    This ammo is fantastic. I have a 10.5" pistol with a SilencerCo Omega 9K that I use for coyote hunting and competition. This ammo is the quietest load that I've found for it. The tone is superb. The grouping is terrific.
    The quality is top tier. As long as Minuteman keeps making this ammo I will keep being a customer. Great job!

  • 300 Black out 220G subsonic

    Posted by Christopher Sebestyen Dark Horse Training on 26th Jul 2020

    Great ammo, great customer service and overall great company. I got an email when the rounds were available, I ordered, they shipped quickly, I got the box it was damaged and they emailed me back in 10 mins on a Sunday. They made sure my order was right. You don't find service like this these days especially with gun/ammo places. Keep up the good work you will have my business. Thank you.

  • Fantastic, Consistent, and Available

    Posted by Pete on 16th Jul 2020

    First time purchasing 220GR from Minuteman Munitions. I could not be more pleased. Put 300 rounds through my SBR SR-30 and I am very impressed with the performance and consistency. After shooting many brands of sub ammo I can't stress enough how important it is to ensure that you have ammo designed to perform in a SBR, which this ammunition is. The icing on the cake is the fast order processing and shipping time. I placed my order 2 days before a range meetup and I had the ammo in hand, in time. Great company, great product, and I will definitely be ordering my subs from Minuteman Munitions in the future.

  • Great Ammo, Amazing Service

    Posted by Peter McKernan on 13th Jul 2020

    Just had a great experience with this ammo. Put 300 rounds through my SR-30 yesterday and cannot capture the words to describe how pleased I am with this purchase. Even better that I had the order in hand 2 days after placing my order on the website. 5 star ammo and 5 star service is tough to find these days, but Minuteman Munitions nailed it. Thank you so much, please keep pressing so I can buy more!

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.
Sign up for our newsletter