Read our AR9 Build Guide here.įirst, let’s break down the ballistic data of both cartridges. It maintains that popularity thanks to its power, small size, high capacity, and, like 300 BLK, its wide range of grain weights and ability to be easily suppressed. It's earned favor as "the world's most popular and widely used military handgun and submachine cartridge," per the 2014 edition of Cartridges of The World. It was produced in 1902 in Germany for the Luger pistol, and today it remains one of the most popular sidearm cartridges for NATO and non-NATO forces. The 9mm Parabellum, 9mm Luger, or 9x19mm (7.65x21mm) cartridge is one of the oldest handgun loads still in service. Read our 300 Blackout AR Build Guide here. 300 BLK include swapping the barrel, barrel extension, and gas system. 223-diameter casing, the AR's original bolt and carrier can be used, as well as 5.56/.223 magazines, upper and lower receivers, and parts kits. Importantly, spec-ops wanted a round that could fit in the existing M4 platform with minimal modification. (AAC) for special operations, at a time when SOF units wanted a cartridge capable of providing suppressed and un-suppressed fire with performance similar to the Russian 7.62x39mm found in the AK platform. It was developed by Advanced Armament Corps. 300 AAC Blackout (or simply 300 BLK) cartridge is a necked down 5.56 shell casing topped with a. 9mm Parabellum today, especially as both cartridges relate to the AR platform. Which one should you go with? We're comparing 300 Blackout vs. So, 300 BLK is a pretty direct competitor to 9mm when it comes to building a subsonic, compact AR that can still fire supersonic rounds. Both provide similar AR configurations to accomplish this. Both can be effectively suppressed when loaded as subs. Both cartridges can function as supersonic and subsonic loads with short barrels. 223 caliber bolt-action rifle firing low-velocity (subsonic) ammunition using a GEMTECH G5-5.56 suppressor.Ĭompared to the high-velocity (supersonic) unsuppressed condition, the combination of subsonic low-velocity ammunition and a firearm suppressor provided a reductions of 45, 38, 40, and 48 dB, peak sound pressure level at the muzzle, left, right ears and behind the shooter, respectively.The AR-15 is equally capable of chambering 300 Blackout and 9mm Parabellum. The peak sound pressure levels of a Remington 700. 223 caliber bolt-action rifle firing high-velocity (supersonic) ammunition using a GEMTECH G5-5.56 suppressor. Specific reductions depend on the ammunition and suppressor. ![]() Main article: Suppressor § Subsonic ammunition and reduced sonic signatureĬombined with firearm sound suppressors, subsonic ammunition may significantly reduce sound levels compared to normal ammunition. These are designed from the start as dedicated subsonic projectile systems. 45 ACP ammunition load, of a 230 grain bullet at 850 feet per second, is naturally subsonic.Īlternatively, specialized firearms and ammunition may be used to optimize total subsonic ammunition effectiveness. For example, the traditional American military standard. Some ammunition types were inherently designed with heavier, slower standard bullet weights and velocities. Subsonic ammunition with normal bullet weights often fails to properly function in such firearms. Subsonic loads for 9mm commonly use 9.5 grams (147 gr) bullets at velocities of 300 metres per second (980 ft/s).įor these ammunition loads, balancing bullet weight and velocity are required to ensure that the ammunition will still reliably cycle semi-automatic firearms. In this instance, heavier bullets are loaded in standard ammunition, which reduces muzzle velocity below the speed of sound.Īs an example, the very common 9×19mm Parabellum standard military round is a 7.5 grams (116 gr) bullet at velocities typically around 360 metres per second (1,200 ft/s). Standard calibers Subsonic versions of standard rounds 1.1 Subsonic versions of standard rounds.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |