Aero Precision M4E1 Complete Rifle. Because 300 sounds more powerful than .30, which is why many companies refer to .30-caliber bullets as 300- something or other, like the 300 Winchester Magnum and 300 Norma Magnum hunting cartridgesall of which fire .30-caliber bullets. There are a few facts worth noting about this data: In other words, the 300 Blackout beats the 5.56 like its a 9/11 hijacker locked away in Guantanamo Bay. They arent exactly the same, but they have nearly the same performance and can be thought of as the same cartridge when it comes to ballistics comparisons. . Terminal performance was excellent. However, I found the .300 Blackout clearly has a subsonic advantage and, in turn, offers more versatilityas long as the AR chambered for the round is equipped with an adjustable gas block to maximize reliability. External ballistics is the study of how a bullet behaves as it flies to the target. All in all, its probably a better cartridge for killing deer than 5.56, so not only is it legal its also preferable. When seconds count and the police are minutes away. Aluminum is much lighter than copper or lead, which is why this bullet only weighs 78 grains versus 115 grains for most supersonic 300 Blackout bullets. Please share the pictures of the groups with us on Facebook and what load you are using, I think there is a lot of interest. Thats not an issue with 300 Blackout ammo, though. Others states like Maryland, Hawaii, and Nebraska require you to use ammo that produces a certain amount of muzzle energy regardless of the caliber. I tried this for several rounds with the same thing each time. (L to R) 5.56 NATO, .300 BLK, .30 Carbine. Although .30 Rem. There are two things you can do to increase a bullets energy on target: In general, the best way to increase the muzzle energy of a bullet is to fire it through a longer barrel. This causes the animal to bleed faster and die sooner than if the bullet only enters but doesnt exit. The 300 Blackout was designed to be used with the same boltthe part of the gun that grabs the back of the cartridge, pushes it into the chamber, and extracts it after firingas the 5.56, meaning both cases have to have almost the same dimensions. If youve spent any time poking around online, youve likely heard its . Written By Michael Crites Licensed Concealed Carry Holder Reviewed by by rjacobs Sun Dec 29, 2013 12:09 pm, Post To get down to the nitty gritty; live rounds are "being left" in the chamber. And what are the external ballistics for subsonic 300 Blackout? Perhaps its wishful thinking to have the gun reliably feed both subs and supers in both suppressed and unsuppressed. JavaScript is disabled. For my part, Ive become thoroughly convinced that the 300 Blackout is here to stay, and that it deserves its newfound following. If youre spending money on competition or good instruction, then you generally dont want your accuracy to be distorted by low-quality ammo. The 7.62 Soviet's cartridge taper prevented reliable feeding in AR magazines and created wear on the bolt. . You may discover published data will generate supersonic loads, and you may need to reduce powder charges to ensure each bullet remains subsonic. This issue isnt unique to 300 Blackout bullets, though. While the bullet is obviously much larger, the parent case is 5.56mm so it will fit into the chamber. A 300 Blackout bullet fired from a 7-inch barrel (like youd find on the. Why? That bullet is more blown open than a T-1000 after a run-in with Arnold Schwarzenegger. Jason Imhoff then drafted the specifications for the cartridge that would eventually be approved by SAAMI. PRESCRIPTION 3Bullet: 125-grain Nosler AccuBondPowder/Charge: Accurate 5744, 20.8 grains (compressed)Primer: Federal Small RifleCartridge Overall Length: 2.13 inchesMuzzle Velocity: 2,203 fps. Before we go any further, its worth spending just a moment to get acquainted with the 5.56, as well be comparing it to the 300 Blackout throughout this article. Once you couple in the fact that ammunition and reloading component manufacturers produce extremely diverse bullet geometry as well, it is becoming clearer as to why you need dedicated .300 BLK magazines. No one doubts the deer-killing performance of the 30-30, and the 300 Blackout can match or exceed that. It was first concocted by J.D. He bought one of these https://www.americantactical.us/6334/detail.html and it won't cycle the 208grn hornady amax subsonics without suppressor. Someone once told me that .300 Blackout is the most convenient way to shoot 7.62x39mm in an AR type rifle. Heres a fun example of this principle in action: Thats a .50 BMG punching through three cinder blocks, and the reason its able to pull this off is because its an extremely heavy bullet moving very fast. Frank Green at Bartlein barrels uses the example of High Power rifle competitors using stock Colt 1:7 rifles back in the day experiencing 4 MOA results with 55 grain loads, and sub MOA with the same rifle and shooter using the 69 SMK. I have a CMMG 8.5" barrel. While the cross-compatibility of our .300 BLK and 5.56 NATO rifles is highly desirable, it could be a potential risk if we do not check ourselves and make sure we are putting the right rounds into the right firearm. Click the Go To Forum Thread link below to jump in and discuss this article and much more! At 100 yards energy is still 450 foot-pounds, drift only an inch or so in 10 mph right angle breeze. The only downside of hollow points and frangible bullets is they typically cost about a dollar per round. For what it's worth, sizing brass without the expander ball also goes a long way toward keeping case necks straight, which generally results in solid accuracy. At bottom, bullets damage things, people, and animals by transferring energy to them. I used the following data for these calculations: (Although these cartridges are slightly different, their stats are fairly representative of average 300 Blackout and 5.56/.223 ballistics.). and 5.56 NATO loads. While there are a ton of advantageous crossovers from the .300 BLK to our beloved 5.56 NATO rifles, you might want to reconsider using your 5.56 NATO/.223 magazines for .300 BLK. Instead, it was designed for combat, which typically takes place within around 300 yards (and the vast majority of that combat occurs within about 100 yards). Discreet Ballistics 188-grain Subsonic Selous Machined Expander 300 Blackout (Subsonic), Hornady 110-grain GMX Full Boar 300 Blackout (Supersonic). Most people train with cheaper ammo and then occasionally break out their fancy home-defense ammo to familiarize themselves with how it feels when shooting. A battery of .300 BLK owners might experience perfect functioning of 5.56 NATO/.223 magazines with their .300 BLK firearms, while others may bellow about their woes and despair. For example, some states like Iowa, Washington, and Minnesota only allow you to hunt deer with ammo thats .24-caliber or wider (which excludes 5.56). All of these companies have a reputation for making good but inexpensive ammo thats ideal for practice, plinking, and recreational destruction. Other factory ammo and reloads with CCI 400's were 100%. The bottom line is the Lehigh Defense 300 AAC Blackout 78-grain High Velocity Close Quarters cartridge is one of the single best cartridges for home defense you can buy. The 300 Blackout, on the other hand, is designed to reach maximum muzzle energy when fired through a 9-inch barrel. I was shocked. The muzzle is threaded 5/8"-24 to accept muzzle brakes, flash hiders, or a suppressor. You see, just because all of the gunpowder in a cartridge is burned doesnt mean that increasing the barrel length doesnt offer any benefits. "Not cycle" can mean several things - does it extract and eject the fired round but not feed the next round, something else? The problem is that there are quite a few folks out there that just cannot seem to understand that a rifle bullet that is no longer moving at 2,000 fps, give or take, is not really much of a rifle bullet any more. The NRA, its agents, officers and employees accept no responsibility for the results obtained by persons using such data and disclaim all liability for any consequential injuries or damages. Later, I wondered if it was possible to do something with supersonic handloads that would change the game. In the case of home defense, the main concern is the bullet either missing or passing through your wouldbe assailant, and hitting a loved one in another room, flying through the wall and hitting someone next door, blowing away the neighbors dog, or all of the above. [ARCHIVED THREAD] - .300 Blackout pistol failure to feed issues. Summary: The 300 AAC Blackout is cartridge designed to work in AR-15s and other rifles with shorter-than-average barrels. The 300 Blackout is a rifle cartridge thats more powerful than 5.56/.223 (AR-15 ammo) when fired out of a barrel thats less than 16 inches long and works reliably with both super- and subsonic ammo. TNVC/NGI Giveaway: 15 winners with over $7000 worth of prizes!! Summary: The sweet spot between maneuverability and muzzle energy for a 300 Blackout barrel is around 7 to 9 inches, although you can get slightly higher muzzle energies with longer barrels. These metal shards fly off in multiple directions, causing far more damage than even a well-designed hollow point. Frangible bullets are a little different. You must have JavaScript enabled in your browser to use this website. All three of the rifles tested in this group had trouble feeding the stubby 300 Blackout cartridges if we just dropped the rounds into the opening of actions generally designed for longer cases. The further a bullet has to travel after being fired, the more time there is for drag to slow it down. This isnt an issue with 300 Blackout, which was designed so that it would properly cycle an AR-15 regardless of whether you use super- or subsonic ammo. To correct this and ensure all of their ammo has more or less the same muzzle velocity out of all barrel lengths, Discreet Ballistics offers two loads for this ammo: The bottom line is the Discreet Ballistics 188-grain Subsonic Selous Machined Expander is one of the single best subsonic hunting cartridges you can buy. Its also common for cheap, low-quality ammo to have varying amounts of gunpowder from cartridge to cartridge, which can decrease accuracy. However, you'll only have to do it once. Even if all of the gunpowder has been burned, a longer barrel keeps the gasses contained and pushing on the bullet for longer, helping it reach higher velocities. 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Despite losing 28% of its velocity, the 5.56 is still moving 34% faster than the supersonic 300 Blackout at 200 yards, making it the better choice at that range. There was, however, a concern: The load would only feed about 50 percent of the time. For example, a 55-grain 5.56 bullet bullet traveling just under the speed of sound1,050 fpsonly has 135 ft.lbf. PRESCRIPTION 5Bullet: 130-grain Hornady SPPowder/Charge: Hodgdon Lil'Gun, 19.0 grainsPrimer: Federal Small RifleCartridge Overall Length: 2.02 inchesMuzzle Velocity: 2,259 fps. Years later, I headed out the range with a custom Remington Model 7 chambered in 300 BLK. Here are the Best .300 blackout rifles (Our Picks) 1. Beyond the upgrade in bullet diameter, the 300 BLK offers the versatility of heavy 220 grain plus subsonic projectiles as well as lighter supersonic offerings. What do I need to do to get it to cycle for him? Lets consider the Blackout with 150-grain bullets at 2,100 fps. Back in 2012, I reviewed the 300 BLK in a 16 AAC upper with Remington super sonic and subsonic loads, a link to the post can be found here. Oops, there's been an error. To be honest I will probably shoot the gun suppressed 90% of the time anyway. 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. That's it. Longer barrels will produce more muzzle energy, of course, but not substantially so. I loaded an additional 10 rounds using the original data and fired them through a CVA Scout with a 16-inch barrel. Apparently, the story goes that an unnamed special missions unit in the U.S. Army asked for a round that could fit inside a .30-caliber rifle, and would be usable with any AR weapon. 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. They came up with a solution for that problem, too. Like the same mid-length gas that's on a 5.56/223 rifle? In supersonic loads, 150-grain bullets are on the heavy side for the .300 Blackout. The 5.56, for instance, is designed to reach maximum muzzle energy when fired through a 20-inch barrel, and barrels shorter than that produce less muzzle energy. The most accurate handload beat out the best factory load by .60 inch when both were fired from the same gun. Springfield Armory recommends you seek qualified and competent training from a . ) A 300 Blackout was not used to take this feral hog, but its parent case, the 221 Fireball, was! The 300 BLK has such a small case you are effectively loading pistol powder into a rifle cartridge. The bolt will not lock back with an empty mag. In the case of home defense, you want to incapacitate the person as quickly as possible, which basically means causing as much damage as possible. Beyond the upgrade in bullet diameter, the 300 BLK offers the versatility of heavy 220 grain plus subsonic projectiles as well as lighter supersonic offerings. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. A grain is a unit of measurement used in the firearms industry for measuring bullet weights, equivalent to about 1/15th of a gram. 2023 Springfield Armory. You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. 4500$, Caliber: If you also know a bullets ballistics coefficient, you can then use a ballistics calculator to estimate how much energy the bullet loses along its path to the target. The bullets also behaved very differently after entering the wood. The team at Discreet Ballistics call this bullet their Machined Selous Expander, and they achieved this menacing effect through a few neat feats of engineering: The result is a bullet that reliably expands to over three times the width of the original bullet, creating a wound nearly an inch wide. Not in the sense that leaving a bottle of lotion on the coffee table and playing Goodbye Horses is a terrible way to impress a date, but it also isnt what most of the breathless fanbois are fainting over, either.
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