The recovered weight (RW) is the weight in grains of the largest portion of the bullet. Much like the 300 BLK, the 7.62x40WT only requires a new barrel and ammunition to switch calibers. This is assuming that both of these bullets were fired through 16-inch barrels, though. ALWAYS CONSULT COMPREHENSIVE REFERENCE MANUALS AND BULLETINS OF PROPER TRAINING REQUIREMENTS, PROCEDURES, TECHNIQUES AND SAFETY PRECAUTIONS BEFORE ATTEMPTING ANY SIMILAR ACTIVITIES. This additional mass gives the 300 Blackout a lot more momentum to push through obstacles and into your target. Granted, not all obstacles are going to be soft pinewood, but this does illustrate just how much more effective the 300 Blackout is at penetration than the 5.56. He is a Glock and Smith & Wesson Certified Armorer as well. Bullets in the Barnes Triple-Shock family typically need more velocity than traditional cup-and-core bullets to expand, and the .300 Blackout just does not generate a lot of velocity. In short, the 300 Blackout is definitely worth investigating. by jFlacoS Sun Dec 29, 2013 11:13 am, Post Copyright 2023 National Rifle Association, Women On Target Instructional Shooting Clinics, Volunteer At The Great American Outdoor Show, Marion P. Hammer Women Of Distinction Award, Women's Wildlife Management / Conservation Scholarship, National Youth Shooting Sports Cooperative Program, 11 currently available .300 AAC Blackout factory loads, SilencerCo Launches Harvester Subsonic Ammunition Line, HPR Introduces the New .300 AAC Blackout in 110-Grain Barnes TTSX Configuration, Ruger Mini-14 Tactical Rifle Now Available in 300 AAC Blackout, Lessons Learned From a Ballistician | An Official Journal Of The NRA, New: Fiocchi 5.7x28 mm Subsonic Ammunition | An NRA Shooting Sports Journal, New: Browning Ammunition SUB22 Subsonic Rimfire | An NRA Shooting Sports Journal, Feeding The Ishy Low-Pressure 7.62 mm NATO For Indias Enfield | An NRA Shooting Sports Journal, First Look: Mission First Tactical Multi Mount, Is It Right For You? Discreet Ballistics 188-grain Subsonic Selous Machined Expander 300 Blackout (Subsonic), Hornady 110-grain GMX Full Boar 300 Blackout (Supersonic). Buy Guns Now to Avoid the Run. On the other hand, skeptics claim that 300 Blackout ammo is overrated, overpriced, and flat-out inferior to most other kinds of ammo you can shoot. It's usually the shorties - under 10" - that need the can to cycle with subs. 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. Its more powerful than 5.56 ammo when shooting subsonic (quiet) bullets. Open the gas port up a little at a time until the bolt will lock back on an empty magazine. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Not sure how to make sure the gas port is properly aligned. As you learned a moment ago, the 300 Blackout has significantly more muzzle energy when fired through short barrels than the 5.56. 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.). It would work well for defense and tactical applications; the bullet's bonded construction would help it hold together when encountering a barrier. Discreet Ballistics also went to great pains to ensure that the bullet was as accurate as possible when fired through a suppressor, which is their modus operandi. . bullets hang onto it while deflecting minimally in the wind. 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. As long as the cartridges you want to use will fit in AR-15 magazines, then they will likely work in any AR-15 lower receiver. A grain is a unit of measurement used in the firearms industry for measuring bullet weights, equivalent to about 1/15th of a gram. After a second or two, youre pushing as hard as you possibly canyour powder has been completely burnedand you cant exert any more force on the car. Where are you located and maybe somebody local can take a look at your gun. Flat nose rounds do not feed and again single feeding is difficult and requires pointing the muzzle towards the ground and getting the nose of the round into the chamber and out of the gap. If you want to fire 300 Blackout through your AR-15, all you have to do is buy a 300 Blackout upper, slap it on your AR-15 lower, load up your AR-15 mags with 300 Blackout ammo, and start shooting. I recently finished a 300 blackout SBR build and I'm having some failure to extract issues. Although more difficult, you can even adjust for the 2 feet of drop at 300 yards. The only downside of these cartridges is the cost$1.8 per roundwhich makes it expensive to practice with this ammo. It's a fun, lower velocity round that can really pack a punch. An adjustment in overall length might correct this problem. To create this kind of chart, you need a few pieces of information: The topic of ballistics coefficients (BC) will get an article of its own, but the short story is that BC is a measure of how effectively a bullet is able to slip through the air and maintain its velocity after being fired. Obviously the results of firing a round in this manner would be catastrophic. As you can see, the 300 Blackout has about 100 (ftlbf) more energy than the 5.56 at almost every distance. If you live above ground, though, then every bullet that doesnt stick in your assailant could hit someone who didnt deserve it, and thats not cool. Because velocity is critical to performance, this load should be a great match for an SBR. I say that because they aren't getting stuck, it's almost like the bolt/extractor isn't even engaging the case. The .300 BLK has easily been the most successful new caliber in the last 20 years. This matters because in most home defense or combat scenarios, you arent going to have a good shot at your enemy. Well, firstly, the aluminum nose of this bullet allows it to penetrate relatively soft obstacles like drywall, glass, and plywood without falling apart like 5.56 would. by jFlacoS Sun Dec 29, 2013 10:42 am, Post Known for its ability to deliver heavy subsonic bullets for standard AR magazines while cycling the action in suppressed applications, [], Ive done a few Special Purpose Rifle (SPR) builds over the years and was always happy with the results. There are many different theories on what makes the best hunting ammo. I like my 300 BLK, but see it for what it is. Having a high muzzle energy is nice, but it wont matter if the bullet loses most of this energy before it hits your target. It may not display this or other websites correctly. Aero Precision M4E1 Complete Rifle. . So if you enjoyed this, would you share it on Facebook and Twitter? Remember, one of the main selling points of the .300 Blackout is that all of the parts are the same as your 5.56mm rifle, except for the barrel. 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. Ive gotten quite a few emails from shooters with experiences mirroring mine. The recovered diameter (RD) was measured in inches across the face of the bullet in two spots and represents the average of those two measurements. The cartridge simply cannot push them fast enough to ensure expansion. Its also common for cheap, low-quality ammo to have varying amounts of gunpowder from cartridge to cartridge, which can decrease accuracy. The alternative of using the correct magazine is beginning to sound more and more appealing. With the 210-grain Berger VLD Target handload, four of the 10 rounds were above the speed of sound even after reducing the powder charge. The set-out problem is caused by inadequate neck tension and trying to taper-crimp cases that are not all exactly the same length. As an added bonus, its all-copper construction means you dont have to worry about picking slivers of lead out of your steaks. Do you want to know why the right to bear arms exists, why its worth protecting, and what you can do right now to save it? You only need to buy one AR-15 lower, but you can fire many different cartridges through it if you buy multiple uppers. The bullets also behaved very differently after entering the wood. Unfortunately, many companies are often out of stock of 300 Blackout ammo in this price range, but Sellier and Bellot, Magtech, and Armscor tend to be easier to find. With that out of the way, lets look at the bullet drop of the 300 Blackout. Apparently not. For one thing, even if all of the gunpowder is burned, you can increase the muzzle energy of the bullet by keeping the gasses trapped inside the barrel for longer, allowing more time for them to push on the bullet. The ability to shoot 30 caliber bullets from a standard AR-15 M16/M4 style rifle bysimply changing the barrel and ammunition has made the 300 AAC Blackout (300 BLK) a popular choice for AR shooters looking for an alternative to 223 Remington/5.56 NATO. The Blackout with a 220- or 225-grain bullet can be driven at least 1,000 fps from a 16" barrel to give about 488 foot pounds of energy at the muzzle. Enter your email address to subscribe and receive notifications of new posts by email. That's including two dismal groups caused by the inability to taper-crimp Nosler bullets. (Heres a good video that explains how this works). Often theyll ask something like, Ive been shooting and reloading for years, no matter what I try, I cant get the gun to shoot better than 2 MOA, with an occasional 1 MOA group, why is this? If this interplay between barrel length, bullet energy, and ballistics coefficient seems confusing, I dont blame you. It penetrated more than 32 inches in gelatin and showed no expansion. I have a Seekins Lower & Upper, NOVESKE 14.5" Barrel, KAC URX 3.1 13.5" rail, Spikes Tactical 5.56 BCG, Spikes Tactical Milspec Buffer Tube Kit, and PRI Gasbuster Charging Handle. Other factory ammo and reloads with CCI 400's were 100%. In addition, my testing revealed it is relatively easy to assemble .300 AAC Blackout handloadsboth subsonic and supersonicthat are more accurate than factory loads. With. This load should also work well in a self-defense role where over-penetration is a concern. What do I need to do to get it to cycle for him? The problem becomes even more pronounced when the round is fired from a carbine or pistol-length barrel, and that's where .300 Blackout steps in. At 400 yards, though, the bullet has dropped almost 5 feet. This is particularly true at longer ranges, where bullets begin to drop faster and it becomes harder and harder to predict where they will land. lighter spring? One new winner* is announced every week! AR, I did not have to taper-crimp bullets weighing less than 150 grains. If a 50-grain bullet from the Fireball can do in a hog of this size, the 300 Blackout should have no problems. . We dive deep into the best of the .300 Blackout. 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. It should work in AR-15 rifles and magazines, with only a change of the barrel required to make it operational. ), you have the overlap of a 5.56 NATO/.223 bolt-carrier group (BCG), and you can use 5.56 NATO/.223 magazines as well sort of.
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