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


Orders Ship in 3-10 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 1:8 twist required to ensure projectile stabilization, 1:7+ is recommended for best accuracy. 




Write your own product review
  • 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!

  • Best 300 Blackout I have shot

    Posted by Dustin Harkins on 25th Jun 2020

    Can't complain, this stuff works in my Sugar Weasel PDW without a problem. Zero problems, usually always some in stock, insanely fast shipping, and great folk.

  • Great Service and Ammo

    Posted by Phillip on 22nd Jun 2020

    300 Blackout is hard to come by at a reasonable price. I placed my order on Sunday evening and received it Tuesday! I got good feedback about my order as well. I'm in NC and expected fast shipping but would not have been surprised if there was a day or two delay in our current times. I've only fired a few rounds to see how they cycled and they all went bang and flew straight. I'm happy so far and plan to buy more. Thanks Minuteman!

  • Definitely Best

    Posted by TATSK1 on 20th May 2020

    Have it with my 8” barrel with suppressor. Been best 20 rnds all the way and fast ship too. Thanks

  • Excellent!

    Posted by Gary Smedley on 12th May 2020

    Great Ammo. No issues when running through my DDM4 PDW. Great customer service and fast shipping.

  • 300blk

    Posted by Drexel Mathews on 14th Feb 2020

    For training rounds, I won't buy anything else. They are extremely consistent, phenomenally priced and the shipping is fast. 10/10 would recommend.

  • Best there is

    Posted by Alex Macksey on 8th Jan 2020

    Minuteman's 300BO is by far my favorite. Very consistent, reliable, and clean, at a price that can’t be beat. Lightning fast shipping. Pay no attention to the other guy’s 1 star review, you won’t find a round you like more than this!

  • 300 Blackout 220gr. Subsonic

    Posted by Russ Berry on 25th Dec 2019

    300 Blackout 220gr. Subsonic Is excellent ammunition, works flawlessly in my Daniel Defense DDM4 ISR

  • 300 blk out

    Posted by Joseph Gasparovic on 6th Nov 2019

    Leaving a 1 star review because they lie about same day shipping. I haven't received the ammo to rate but won't buy from again due to shipping not being same day.

    Response: We apologize for the inconvenience, however your order was placed at 1:45pm EST after our 1pm EST cutoff time. The cutoff time is clearly stated on each item.

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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