Subsonic 300 blackout ballistics series#
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 demands 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. 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. Methodical load development by Discreet Ballistics has created a system which will minimize point of impact shift allowing the shooter greater confidence when it’s time to hunt.The. The Discreet Ballistics’ two load system was conceived so that the shooter of subsonic ammunition can practice with a less costly Target load, and hunt with a premium load utilizing the Selous Machined Expander.
Hunting Loads utilize the Selous Machined Expander 188gr solid copper projectile which expands to over three times its original diameter upon entering fluidĮffective range is usually within 75-100 yards due to dramatic bullet drop past 100yds – Muzzle velocity is typically between 900-1050fps depending on the barrel. Industry leading seating depth consistency.
Powder charges consistent to within 0.1 grain
Utilizes brand new Discreet Ballistics headstamp brass
Subsonic 300 blackout ballistics software#
This projectile was designed using state-of-the-art ballistics modeling software to maximize stability at subsonic velocities. The Discreet Ballistics 300 AAC Blackout 188gr Selous Machined Expander is a subsonic hunting load that incorporates a machined copper 30 Cal projectile (the Selous bullet) which expands at subsonic velocities above 750 feet per second.
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