The easiest solution is to use a special bullet thats designed not to overpenetrate such as a lightweight hollow point or frangible bullet. It's usually the shorties - under 10" - that need the can to cycle with subs. Some bullets require a certain barrel length to reach maximum energy, and using shorter barrels makes them far less effective. by smustian Sun Dec 29, 2013 1:08 pm, Powered by phpBB Forum Software phpBB Limited. The 300 AAC Blackout was designed to achieve energies similar to the 7.6239mm Soviet in an AR-15 while using standard AR magazines at their full capacity. Scientifically, logically, and anecdotally, its a winner, and Im going to show you why in this article. Their higher B.C. The cartridge simply cannot push them fast enough to ensure expansion. The same properties that make 5.56 bullets fragment inside people also make it break apart when it hits wood or metal. At the time, the U.S. military was embroiled in multiple large scale urban battles across Iraq, and many special forces units had started using short-barreled rifles to make it easier to maneuver when fighting house-to-house. If your first priority is subsonic performance from a .30-caliber AR, go with the .300 AAC Blackout and heavy bullets. This is the perfect balance of barrel length for high muzzle energies, they say, without making the gun front-heavy and awkward to shoot. Some people question whether or not the 300 Blackout is effective for killing deer, and the simple answer is, yesabsolutely. I first viewed the 300 Blackout with a jaundiced eye, but it's proving to be one heck of an effective, close-range hog sweeper. Most barrel makers and benchrest shooters will tell you the best accuracy for a given bullet is obtained with a twist rate that just stabilizes the bullet. I have heard you only want to convert brass from the US to 300 Blackout brass. I would note that of those three things the Springfield Saint 300blk has only the first. Typically, these bullets are the product of thousands of hours of computer-aided design and testing and are much more expensive to make than standard practice ammo, but theyre well worth the cost. While the bullet is obviously much larger, the parent case is 5.56mm so it will fit into the chamber. And to take things a step further, what if you want to hunt animals like deer, hogs, or even elk with 300 Blackout? Instead, you want the bullet to enter the target, transfer all of its energy and lethal force to the person, and stop inside them without flying out the other side. Not sure how to make sure the gas port is properly aligned. This is why the 300 Blackout is also called the 7.6235, which corresponds to its bullet width and case length in mm, respectively. No one doubts the deer-killing performance of the 30-30, and the 300 Blackout can match or exceed that. With a 16" barrel and mid length gas system it 'should' be able to cycle using subsonic ammo even without a can. In my opinion, the bread and butter of the 300 BLK is short barrel rifle applications, especially with a suppressor (what isnt cool about a 10 300 BLK with a can and IR laser?) Momentum! In the case of 300 Blackout, you either . I spent several hours chambering dummy cartridges with a variety of bullets and measuring set-out, and in fact, I found it occurred to some extent with every bullet tested. And what are the external ballistics for subsonic 300 Blackout? This test is a good example of the penetrating power of 300 Blackout: In the video, a 300 Blackout bullet penetrates 24 inches of pinewood whereas a 5.56 bullet only penetrates 16 inches of pinewood. . What is true, though, is that you quickly reach a point of diminishing returns by increasing the length of a 300 Blackout barrel much beyond 9 inches. I found somebut not allHornady and Remington brass had crimped primers. A Magpul .300 BLK PMAG (left) and a 5.56 PMAG (right). Because if that bullet keeps going after cutting through a bad guy theres no telling who it might hit. Buy Guns Now to Avoid the Run. It can be used in AR-15s with minimal modification. The Definitive Guide to 6.5 Creedmoor vs. .308, The Second Amendment Manifesto: What Every American Should Know about Their Constitutional Right to Own Guns, 300 Blackout Ammo Is More Powerful, Efficient, and Lethal When Fired out of Short-Barreled Rifles Than 5.56 Ammo, 300 Blackout Ammo Is More Powerful Than 5.56 Ammo When Shooting Subsonic (Quiet) Bullets, 300 Blackout Ammo Is Legal and Effective for Killing Deer, 300 Blackout Ammo Can Penetrate through More Material (Walls, Trees, People . Springfield Armory recommends you seek qualified and competent training from a
Sorry, an error occurred and we could not sign you up. This matters because in most home defense or combat scenarios, you arent going to have a good shot at your enemy. While this makes sense at first glance, its not entirely accurate. and 5.56 NATO loads. Not only do hollow points create much larger holes, they also cause the bullet to slow down much faster after entering the target, reducing the chances that itll pop out the other side. Thats not an issue with 300 Blackout ammo, though. When youre looking for plinking and practice ammo, a good rule of thumb is to look for the absolute cheapest ammo possible, and then go with whatever is slightly more expensive than that. With. Open the gas port up a little at a time until the bolt will lock back on an empty magazine. Let me know in the comments!). There are three key points worth noting about this data: Summary: You can easily make accurate shots with supersonic 300 Blackout ammo up to 300 yards away and 200 yards away with subsonic ammo. As weve already covered, a well-designed subsonic bullet can be quite lethal, but its never going to cause as much damage as that same bullet moving at supersonic speed. The more energy a bullet imparts to a target, the more damage it causes, and the likely it is to kill someone or destroy something. Worth the price if your lifes on the line, though. The only prep work I did before loading was sizing the cases, tumbling them and chamfering their necks. As you learned a moment ago, the 300 Blackout has significantly more muzzle energy when fired through short barrels than the 5.56. If youre going to use 300 Blackout ammo for hunting, though, its essential that you use hollow points, which are significantly more effective at killing big game than full metal jacketed bullets. 300 Blackout ammo in this price range will typically have brass cases (which are more reliable and cause less wear and tear on your gun than steel), full metal jacketed bullets, higher quality primers, and gunpowder thats less corrosive, extending the life of your firearm. Terminal performance was excellent. What if you prefer to hunt with subsonic 300 Blackout ammo fired through a suppressed rifle? In fact at the 300-yard mark your typical 68-77 gr .223 round will be delivering more energy than that 300-Blackout/Whisper round . 7.62x39mm is a respectable cartridge and so is .300 Blackout when it is loaded to supersonic velocity. This is certainly the prominent selling pointof the cartridge, but one of the areas the 300 BLK will sometimes lack is accuracy. Best of all, it was designed from the ground up to work in Americas favorite riflethe AR-15with only a quick change of the barrel required to shoot it. The muzzle is threaded 5/8"-24 to accept muzzle brakes, flash hiders, or a suppressor. Hence, .30-caliber is about one third of an inch. Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. Do you care about your Second Amendment rights? You only need to buy one AR-15 lower, but you can fire many different cartridges through it if you buy multiple uppers. The Best 300 Blackout Ammo for Plinking and Practice, The Best 300 Blackout Ammo for Classes and Competition, The Best 300 Blackout Ammo for Home Defense. If it's not feeding the next round you might try a lighter weight buffer or a different magazine or different type of magazine with a different spring rate. Jones chambered T/C Contender handguns for these rounds and called them Whispers because he was keeping muzzle velocities below the speed of sound. Never miss a post! The 1911 is an iconic design, and the 2011 takes it one step further. I even took the time to order a special 1:7 twist barrel from Bartlein barrel to give me the edge with the heavy loads. If you don't want to complete a build, however, Aero Precision also sells completed rifles. Check the Price. If it is mixed brass of 223/5.56 brass that was converted to 300 Blackout I have read in a couple of Forums that NATO 5.56 wall thickness creates issue when trimming or cutting it to make 300 blackout brass. This added weight also gives the bullet enough momentum to continue spinning several times after entering the target, creating an effect thats akin to a flying blender blade slicing through your prey. Machining a wide hollow point bullet out of a solid slug of copper (which expands more reliably and holds its shape better than a mixture of lead and copper). To get down to the nitty gritty; live rounds are "being left" in the chamber. Take a lookat some legitimate load development and testing and youll start to notice that it is very hard to get a 300 BLK to shoot consistently well with both a subsonic and supersonic cartridges from the same gun- a fact that has led a few major manufacturers to avoid introducing bolt-action rifles in this caliber. The 300 BLK rifle magazine is based on the original design offered by the company and provides a steel and polymer design for both a translucent smoke finish and solid black options The reliable, and trouble-free feeding system is tailored perfectly for the dimensions of the 300 BLK cartridge. In this perspective, a rifle loaded with subsonic .300 Blackout may as well be a pistol caliber carbine. Whether you're using a 7.5-inch, 10.5-inch, or even 16-inch barrel, sub-sonic .300 BLK vastly outperforms 5.56 NATO when fired from a suppressed rifle. In fact, it was faster than any factory load I tested. Ammo used was Remington 125gr supersonic and 220 subsonic. (Just make sure you dont accidentally shoot 300 Blackout ammo through your 5.56 upper, or this happens.). Lets consider the Blackout with 150-grain bullets at 2,100 fps. Not the best for accuracy. . We have to pick a number, though, so lets run with the Hornady Sub-X Subsonic 190-grain bullets, which have a ballistics coefficient of 0.437which is probably close to the average for subsonic 300 Blackout bullets. To be honest I will probably shoot the gun suppressed 90% of the time anyway. Eotech solved this problem when they created the dual zeroed XPS2-300 for the 300 Blackout caliber in both super and subsonic. My problem is that once you drop the bullet weight to gain enough powder to make the 300 Blackout supersonic/high-velocity so that it will actually cycle in your average AR-15, you gain nothing over the .223 round. On some well-known and established forums, youll note the majority of load development occurs at short ranges with 50 yards being common and 25yard groups appearing at times! The military was interested in this kind of performance for clandestine operations, I assume. To be fair, .300 Blackout is not actually terrible in its own right, it is just that the primary purpose for having one is to shoot subsonic ammunition and subsonic ammunition really is terrible for defense. Well talk more about how the 5.56 and 300 Blackout stack up against one another in a moment. The bolt will not lock back with an empty mag. Terminal ballistics is the study of how the bullet behaves after it hits the target. You see, just because all of the gunpowder in a cartridge is burned doesnt mean that increasing the barrel length doesnt offer any benefits. Spikes likes to use "HeavY" buffers in their kits for .223, 300 BlkOut Issues: Failure to Feed, Double Feeds, Stuck Ammo, http://www.youtube.com/watch?v=iVzCQ0LL2A8, Re: 300 BlkOut Issues: Failure to Feed, Double Feeds, Stuck. Posted: 2/5/2017 7:33:39 PM EST [#13] Quote History AAC took the .300 Whisper, made slight modifications to the case and bullet to improve reliability, accuracy, and performance, and birthed the 300 Blackout (theres more to this story, but thats the long and short of it). The only problem I ran into while handloading the .300 Blackout was with bullet set-out when the cartridge was chambered. The .300 Blackout has had a few years to grow now. In the case of home defense ammo, you generally dont want the bullet to go through-and-through as its called. bullet all the way up to 220 grains. It's a fun, lower velocity round that can really pack a punch. A cartridge load for 16-inch barrels with slightly less gunpowder to keep the velocity under the speed of sound when fired out of longer-barreled rifles. Hornady 300 Blackout 125-grain Full Metal Jacket Frontier (Supersonic), Hornady 300 Blackout 125-grain Hollow Point American Gunner (Supersonic), Hornady 300 Blackout 208-grain A-MAX Hornady BLACK (Subsonic). The 5.56 starts out moving faster than the 300 Blackout, but loses velocity quickly due to its light weight and low ballistics coefficient. The 7.62x40WT is a nifty little cartridge for the modern hunter who wants to stalk game with a standard sized AR-15 M16/M4. articles and videos are considered to be suggestions and not recommendations from Springfield Armory. TS Customs Quick Adjust Knob for KMW Loggerhead Cheekpiece, Modular Driven Technologies (MDT) HS3 Chassis Review: Part 2 Shooting the MDT HS3 Chassis System, Rifleshooter.coms 50-25-7 Practical Carbine Standard, Shortening a shotgun stock and fitting a recoil pad, Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver. Theyre designed to lock onto the gun and then push fresh cartridges into the inside of the gun so they can be chambered and fired. Next, I tested terminal performance by firing each load into blocks of 10-percent ordnance gelatin. Let's consider the Blackout with 150-grain bullets at 2,100 fps. You have to step up to the true heavyweights to get below the speed of sound. 300 blackout uses very fast pistol powders and the pressure spikes optimum for cycling happens early. Just like with the 190-grain VLD handload and most factory subsonic loads, bullet expansion was nonexistent and penetration was excessive. Weakening key points along the length of the ogive so that slivers of the bullet poke out at angles designed to cause maximum trauma inside the target. Either the bullet was slipping forward in the case when the cartridge was chambered, or the carbine just did not like the AccuBond. In the case of hunting ammo, you want your bullet to penetrate deep into the animal and if possible, go completely throughentering one side and flying out the other. Magazines, often incorrectly referred to as clips, are spring-loaded metal or plastic containers that hold ammunition. The bullets also behaved very differently after entering the wood. The alternative to not using an actual .300 BLK magazine is to employ a 5.56 NATO/.223 magazine and then exercise more than stringent ammunition management to ensure a failure does not occur.
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