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Black Butterfly Ammunition

Black Butterfly Ammunition Remanufactured, .308/7.62x51mm, 220 gr., 5 Rounds, "THUMPER PRO", SUBSONIC, SAMPLE PACK, for 1:10 Twist 20" BOLT-ACTION Rifles

Product Code : 5


Mfg Item #: BBA-308/7.62x51mm-REMAN-220-PRO-5-G-08


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Manufacturer Description:

Black Butterfly Ammunition Product Testing videos

This is Remanufatured brass ammunition

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About Us

Our main company goal is to produce an excellent product that will operate efficiently and effectively in your firearm.

The Black Butterfly Ammunition Company was created to meet the needs of the discerning specialty shooters who prefer quality over cheaper than dirt, mass produced, factory ammunition.

Each round produced by The Black Butterfly Ammunition Company is hand manufactured and individually inspected by a loading expert to insure that we produce the finest quality ammunition available. This includes visual inspections and appropriate case gauge testing of each round produced. In addition, we randomly sample and shoot our production loads at our onsite range, this way we can ensure it will meet our stringent requirements and will function properly in your firearm.

The Black Butterfly Ammunition Company warrants the original consumer purchase for 1 year from the date of purchase. At our discretion, we will replace or refund the original purchase price provided a proper proof of purchase is submitted. Our warranty will be free of charge except for any shipping charges that might be incurred by the customer to return their product to our facility. Of course, this warranty does not cover product abuse such as neglect, reloading, and or any other issues caused by improper handling.


Black Butterfly Ammunition, Remanufactured, .308/7.62x51mm, 220 gr., 5 Rounds, "THUMPER PRO" SUBSONIC

This round is recommended for target and close range hunting purposes. This load uses the 220 grain copper plated lead projectile.

This load runs at AMV of 1075 AMV FPS and is very quiet if you use a suppressor.


If you are using a suppressor, we recommend utilizing a 1:10 twist barrel or faster. As always, contact your suppressor manufacturer to confirm your specific barrel will stablize this projectile.  Prior to shooting any subsonic ammo through your can for the first time, always remove the can, shoot the ammo to the desired distance to confirm it is not tumbling, then replace your can. 

  • If you have a barrel length shorter than 20", we recommend you purchase a sample pack to try in your specific rifle first.
  • If you shoot this ammo in a shorter barrel much of the powder will be burning after the bullet leaves the barrel, due to the reduced friction and missing barrel length you may hear a supersonic crack.

This round has been tested been independently tested in the following rifle and has achieved accuracy of sub MOA 1" groups at 100 yards:

1. Remington 700 SPS Tactical. 20" Heavy-Countour Tactical Barrel, Bolt Action with a 1/10 twist. 

      • Remanufactured Military Once Fired Brass made for us by Top Brass.
      • ROUNDS: 5
      • 220 grain copper plated lead projectile. 
      • Premium Branded Powder
      • Average Muzzle Velocity: 1075 FPS
      • This product comes packaged in clear heavy mil zip bag.
      • This product has been tested SAAMI spec rifle as noted above.
      • This product has been individually case gauge tested using SAAMI spec case gauges.

More about Top Brass:

Top Brass purchases once-fired military brass from the Department of Defense and performs every step necessary to bring it back to ideal reloading condition. In addition to reconditioning various calibers of shell casings, Top Brass also provides new brass in a variety of calibers both mil-spec and commercial, as well as bullets and projectiles both new and military surplus for most calibers.

In addition to the reloading products above, we provide high-quality injection-molded plastic trays and cardboard packaging to match, providing safe, convenient and flexible storage options for a wide variety of popular calibers.

We aim to provide a high level of customer service and provide the best product money can buy in all our new and reconditioned products. With stringent inspection processes at every step, it is our goal to ensure we provide the tightest tolerances and most consistent product possible with once-fired brass, no matter the caliber. Our strict quality controls ensure you get only the highest quality product so you can buy with confidence.

Top Brass is your one-stop shop for almost all your reloading needs.

Learn more about our Proprietary Brass Cartridge ReSpec Process

Determined at checkout.