Gorilla Silverback, 300 BLK 205gr, Self Defense & Hunting Subsonic Ammunition – 20 Round Box 


This product is limited to 10 boxes per customer and shipping address.  Any duplicate orders will be canceled. 

(26 customer reviews)

Out of stock

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Due to component shortages, we are currently using mil-spec primers in 300BLK loads. These primers contain a harder primer cap designed for use in semi-automatic weapons. You may experience lite strikes in bolt action platforms due to the harder primer cap. Please be aware of this issue before purchasing. For safety reasons, we do not allow returns once the product has been delivered.

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26 reviews for Gorilla Silverback, 300 BLK 205gr, Self Defense & Hunting Subsonic Ammunition – 20 Round Box 

  1. Ryan Terrett (verified owner)

    I’m a hog hunter and have have my fair share of hogs that got away even after a solid vital organ shot. I changed 2 things, my ammo and my aim. I take head and neck shots only and use Gorilla’s Silverback expanding ammo. Even my slow moving, subsonic 300 Blackout ammo has taken down every hog I’ve shot with only 1 good shot. Generally subsonic ammo is not a good hog round but I am in a residential area and have to use it. Gorilla has worked great. No cycling issues with my AR either.
    Ryan T

  2. Jeff Baker (verified owner)

    I am going to echo the previous review. This sub-sonic round is perfect for the under 100 yard shots and you don’t want leave much of an audio footprint. It is accurate enough for neck and head shots and has the horse power to take the whitetail down with one shot. I had 3 kills last season and each deer dropped right where they stood.The round cycles flawlessly as well. It is a little expensive, but I think it is well worth the cost for the instant death blow it delivers on a regular basis.

  3. Adam Konrade (verified owner)

    Highly impressed! I’ve never seen a subsonic round perform this well before. Started off buying two boxes to test and review and came back for more. I’ve posted a video review of this ammo on my YouTube channel link below. Well worth the money, I couldn’t be more happy with it! https://youtu.be/pxg3n58IPLE

  4. KB (verified owner)

    Bought 1 box for trial and found them to shoot very accurately at the range. The most consistent subsonic round I have ever shot. Ordered more as soon as I returned home.

  5. Brandon Skidmore (verified owner)

    I recently order some 300blk out silverback 205gr and some 223 62gr controlled chaos. I got it today and i couldn’t be more happy/impressed with your products. I can definitely tell this is some of the utmost top tier ammo. In addition the packaging is very, very nice. They are boxes i plan on keeping, not to mention the clam shell they come with. Just wanted to let you guys know and thank you for fast shipping. Hope you all had a great 4th and thanks again y’all take it easy!
    P.S i will definitely be buying more from you soon.

  6. Fred L Blank (verified owner)

    Order was filled out perfectly, love the Silverback 300 blk 205 Gr.Sub. Love the nickle plated brass, smooooth & more corrosion resistant. Gorilla ammo is my go to mfg. for ammo, they are outstanding & keep trying harder to excel !!

  7. Shawn Kleinstiver (verified owner)

    I have ten 300 BLK short barrel suppressed weapons. They can be extremely finicky. This is the only Ammo that cycles and shoots straight every single time. I have tried every round out there and this stuff is the BomB ! ! !

  8. Steve Haar (verified owner)

    A Veteran brother of mine insisted i get a box “just to try” , shot a few rounds down range out of my PSA 10.5 pistol i built , dont think ive been as impressed since i got VMAX rounds ..great f’ing round gents

  9. Daniel Bingham (verified owner)

    Fed perfectly out of my primary weapons systems 300blk using 300blk magazines, and through my DD wave . Looking forward to trying it on some hogs and a white tail this season.

  10. R.Rheude (verified owner)

    I’m generally very pleased with the products Gorilla offers including this round. Their products are not cheap or inexpensive. However, you really do get what you pay for. Gorilla consistently delivers quality products that I can rely on. I’ve never had a misfire that I can even remotely attribute to their ammo…ever. They just work very well. This Self Defense round is also very much within the technical specifications I desire and in fact, need. I’ve not found a comparable product in the market place.

  11. ken (verified owner)

    As soon as this ammo is back in stock I’ll order more.. its my new favorite subsonic round.. in my 10.5 running a can its scary movie quiet.. everything cycled perfect.. zero is at 50yd and maybe i got lucky but all 5 rounds were touching each other.. ill take that all day.. needless to say stock up on this stuff. Best out there

  12. David Kitchen (verified owner)

    It’s all I use for defense and predators! Absolutely the best.

  13. John Bennett


    I see that Mike has responded to you in e-mail. I apologize we missed your first request, things here are really crazy. The 205’s with their blunt nose can have feed issues, the only suggestion I have is try different mags. PMAG’s seem to present the projectile higher into the center of the chamber for better feeding. I have had people say that a standard mag not a Blackout mag sometimes feeds better as well.

    John Bennett

  14. Josh (verified owner)

    I am beyond happy with gorilla ammo. They are my goto round now. I am always on their wait list. I have shot a few different grains of their 300 blackout and absolutely 0 issues. Pretty soon my safe will only have Gorilla Ammo in it.

  15. Chris Denbow (verified owner)

    I was looking for a good self defense round for my HD/CQB 300 BLK pistol. After watching some videos, I found the Silverbacks on James Yeager’s and Mrgunsngear’s reviews. As soon as Gorilla sent me the in stock notification, I grabbed some. I ran some at the range, to make sure they fed and cycled fine, which they did. Hopefully I’ll never need them for HD, but if I do, I know that I have rounds in my mags that will end the situation in my favor.

  16. Dan Sileck (verified owner)

    I found this round to be very pleasant to fire with great accuracy. I would highly recommend this round if looking for a sub in 300 blackout.

  17. Daniel Sileck (verified owner)

    I found this round to be very pleasant to fire with great accuracy. I would highly recommend this round if looking for a sub in 300 blackout.

  18. John Brown (verified owner)

    Great service…Gorilla contacted me as soon as the ammo was back in stock.

  19. David Kitchen Sr. (verified owner)

    205 gr Silverback is in a league all its own. I have a 9” barrel Sig Sauer MCX and 7” barrel Daniel Defense DDM4 (both are suppressed). I’m tempted to use the phrase “Hollywood Quiet,” but whatever term/phrase you use, these rounds are engineered to have unsurpassed terminal performance/terminal ballistics and to match perfectly with a suppressor. And they’re the most accurate subsonic load I’ve ever used. Full throttle performance is out to 100 – 125 yards; within that range, if you make a semi-decent shot, the animal being targeted drops immediately. For personal defense, nothing competes; in that it will drop a deer or large boar, it should go without saying that it will drop any “bad” guy who is threatening you or loved ones. These rounds are devastating! I keep both my 300 BLK AR Pistols loaded with these rounds and I never worry about stopping power. Quiet and deadly!

  20. Rob Allen (verified owner)

    Super accurate and cycles great suppressed.

  21. Dave De Carlo (verified owner)

    This stuff is legit! I carry my 300 BLK as my truck gun daily. This is my primary Ammo. It functions flawlessly whether suppressed or not. It opens up as designed every time amd it is devastating. I still have the old version with the nickel plate cases and now the brass stuff to keep on hand which is still very very nice. I do wish they still used the nickel cases since all my carry Ammo 9mm & .223 has nickel. Either way, it’s excellent Ammo. Couldn’t be happier.

  22. Carmine Madak (verified owner)

    My go to self defense ammunition for both of my 300blk pistols! No problems feeding! I get a 11/2-2” groups at a 100 yards! I love to shoot them more but they are a little pricey! I don’t mind the price to protect my family!

  23. John Baker (verified owner)

    This is the first of the 300 Silverback I have ordered so I will be trying it out on whitetail this fall. So far all the 300 ammo I have from Gorilla Ammo have been very accurate with less than 1″ groups at 100 yrds. And that goes for my sons shooting as well, nice tight groups. Ordering is simple and the company keeps you informed as to where the ammo is in the shipping process. I have no complaints.
    Best part of all their ammo, feeds reliably. No jams ever! That alone makes it worth the price.

    A satisfied and confirmed user of Gorilla Ammo.

  24. butchyon (verified owner)

    Finally got some of these on my shelf! Can’t wait to give them a try. As always, super-fast delivery after the sale from the good folks at Gorilla!

  25. Jason Brooks (verified owner)

    Excellent ammunition and surprisingly quiet. First time out with this ammo I shot a 150 pound boar in the neck and he ran 20 yards and collapsed. Definitely will be back for more!!

  26. John Walton (verified owner)

    Watched some impressive YouTube videos on this product. Bought a couple boxes with the intent of using it in a deer rifle setup for my grandson. It did not group very well for me using a solid rest. Shooting a new DD DDM4 with a 3lb timney trigger installed. Different ammo shot 1 inch groups the silverback ammo was 3 inches at best. Would like to see it perform on a deer or coyote before being discouraged.

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Gorilla Silverback, 300 BLK 205gr, Self Defense & Hunting Subsonic Ammunition – 20 Round Box 

This 300 Blackout Load features our patent pending CNC Swiss Turned solid copper projectile and factory new brass case. This 205gr Lead Free CNC Lathe Turned Solid Copper projectile is designed, precisely manufactured and finely tuned for maximum expansion at subsonic speed. Long gone are the days of tracking game for hours after what you thought was the perfectly placed shot. The Silverback 205gr Subsonic 300 BLK opens up fast in soft tissue and creates incredible wound cavity that make game lay down upon impact. This cartridge is no longer loaded in nickel cases. These projectiles are precisely CNC Swiss Lathe Turned and feature a unique patent pending design. Our Silverback ammunition line creates devastating temporary and permanent wound cavities which are created by the aforementioned solid copper projectiles. The unique design of the projectiles expands quickly and with insane precision. As you probably guessed the Silverback line of ammunition is manufactured with the same incredibly precise loading and inspection process that results in consistency and accuracy unparalleled in the industry. Our ballisticians have tuned this 300 BLK load to preform well in today’s most popular firearms. If you need subsonic ammo that performs, this is it. The Gorilla Ammunition manufacturing process ensures consistency by pairing high end linear loading equipment with multi stage in-process inspections by highly trained machine operators with a final inspection of each and every round by our quality inspectors to ensure only ammunition that meets our rigorous specifications makes it into the box.

Technical Specifications:

  • Caliber: 300 BLK Self Defense
  • Projectile: 205gr Gorilla Silverback Solid Copper Hollow Point
  • Muzzle Velocity: 1040 FPS
  • Ballistic Coefficient: .42 (G1)

Small Arms Ammunition purchasing disclaimer: You must be 21 or older to purchase rifle ammunition. All ammunition is shipped via UPS ground. Always ensure you use the correct ammunition in a firearm in good working condition. It is the responsibility of the consumer to know and comply with State & local laws regarding the purchase and possession of ammunition. Please check your local laws before purchasing.

Click here to browse our selection of .300 Blackout Ammo.

Additional information

Weight 1.1 lbs