They also wanted a source for ammunition made to their specs. bullets from an M4 platform while using normal bolts and magazines, and without losing the full 30-round capacity of standard magazines. A military customer wanted a way to be able to shoot. Robert Silvers, director of research and development for AAC said, "We started development in 2009, but most of the work was done in 2010. The designers planned several cartridges primarily for the M4 and M16 during load development that not only satisfied the ballistic requirements, but also ensured mechanical reliability with only a simple barrel change necessary for complete conversion. This was particularly noticeable when using subsonic ammunition in conjunction with a suppressor as short stroking and excessive fouling would occur similar to that which was seen in the earliest variants of the M16 in Vietnam. Many of these rounds required an excessively long overall cartridge length that would prohibit feeding in a STANAG magazine while using powder charges that were not compatible with the pressure requirements of the M4 carbine. 300 Whisper series addressed these issues, but their widespread use in single-shot handguns and lack of industry standard cartridge dimension meant that a great number of the popular loads on both the supersonic and subsonic end of the spectrum were less than ideal in the AR pattern weapons. 300 AAC Blackout rounds shot from a suppressed M4 carbine Rounds such as the 6.8 SPC and 6.5 Grendel had similar parts-interchangeability issues but did allow for the use of the standard M4/M16 30-round magazine, albeit with a reduced capacity. Modified bolts were also needed owing to its larger case head diameter. In the case of the 7.62×39mm, its relatively severe case angle caused feeding issues unless specially modified AK-47 magazines were used, and even then results were unsatisfactory. 30 caliber rounds but encountered problems. Colt Firearms and other arms makers had previously chambered AR-pattern rifles and carbines in various. The new cartridge was intended to negate many of the perceived drawbacks inherent to other large caliber cartridges used in the M4. 300 AAC Blackout in cooperation with Remington Defense. While 5.56×45mm NATO has had widespread acceptance in military circles, the nature of the missions encountered by some special operations groups often demand a round that provides better performance than that available in the high-energy, standard velocity rounds, and subsonic performance greater than standard 9×19mm Parabellum (the ubiquitous pistol and submachine gun) round. The 300 AAC Blackout uses standard 5.56mm NATO magazines and components with the exception of the barrel. The cartridge yields increased performance in shorter barrels and effective subsonic performance for silencer use when compared to 5.56mm NATO. ), also known as 7.62×35mm, is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine. 300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P. 300 AAC Blackout plastic tipped, left, compared to. 300 AAC Blackout caliber getting into more subsonic and heavier grain weight data two areas that are typically lacking for information.Īll of Sierra Bullets’ new data can be read below.The. They recently published updated and expanded data for the. Simple solution… reload! Well, there is not much extensive data for reloading either, but Sierra Bullets is trying to help change that. If you are in the middle of nowhere and need ammo, this may not be readily available. For one, this is not a standard gun store shelf caliber. With all of the positives I have just stated, there have to be some negatives. Most shooters use it in varying capacities from 200 yards or less. Since you can work with bullets from 110 grain up to 240 grain in both hypersonic and subsonic loads it boasts tremendous, close-range versatility. A crowd favorite for pig hunting, deer hunting and general subsonic fun with silencers, it remains a strong choice for many shooters. Although the military has not truly fallen in love with the caliber, civilians absolutely have. 30 caliber cartridge in an M4 platform by simply changing the barrel, but utilizing the same magazines. Originally, the cartridge was developed by Remington and Advanced Armament Corporation (AAC) to provide the military with a. 300 AAC Blackout is 7.62x35mm metrically), but you have the popular American platform of an AR-15. It has very similar ballistics to a traditional AK-47 chambered for 7.62x39mm (. 300 AAC Blackout because of its versatility and available grain weight range. Many AR-15 enthusiasts and hunters have a strong appreciation for.
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