When it comes to close engagements and self-defense, even while providing more energy, 300 BLK simply cannot compete with the wide range of hollow-point and critical defense ammunition developed for the 9mm cartridge. The 300 Blackout is still a rifle cartridge firing a long, thin. Lastly, 9mm excels as a personal defense cartridge. Seismic Ammo's 185-grain load provides this velocity with plenty of lead to afford a devastating effect on any target, rivaling performance of similar 180- to 190-grain 300 Blackout cartridges. There are also "extra-heavy" +M loads for 9mm that are perfect for subsonic performance, traveling around 900 FPS at the muzzle. That's only 7% less muzzle energy than a 220-grain 300 Blackout, and it's about equal in energy to a 185- to 200-grain 300 Blackout load. Underwood Ammo, for example, provides a 124-grain 9mm cartridge that provides 1,300 FPS and 465 lb.-ft. It can provide similar performance with supersonic +p+ loads. This greater case pressure, coupled with 300 Blackout's generally larger bullet, is what provides its greater performance. 9mm Parabellum Max Pressure (SAAMI): 35,000 PSI.300 Blackout Max Pressure (SAAMI): 55,000 PSI.All that extra powder translates into a higher maximum capacity: This is not surprising, considering the amount of powder 300 Blackout holds in its casing compared to 9mm. Overall, 300 Blackout performs with better velocity and more power than 9mm when supersonic loads are compared. The heavier grain of the 300 BLK yields more energy, producing approximately 32% more force. Comparing 147-grain 9mm and 220-grain 300 BLK, we get almost identical muzzle velocities (1,010 FPS vs 1,073 FPS). Subsonic Comparisonsģ00 Blackout and 9mm provide substantially similar performance when fired in a subsonic configuration. But keep in mind, these comparisons are made with a 16" barrel. That extra velocity translates into significantly more energy: 300 BLK punches with nearly three times (272%) more pound-feet at the muzzle. On average, 300 Blackout and 9mm supersonics provide similar grain weights (125 grains vs 115 grains beyond two common loads), while 300 BLK maintains a velocity that is approximately 45% faster at this weight. Energy (Average): Supersonic, 594 lb.-ft.Velocity (average): Supersonic, 1,525 fps.Weight (average): Supersonic, 115 grains Subsonic, 147 grains.Energy (average): Supersonic, 1,350 lb.-ft.Velocity (average): Supersonic, 2,215 fps.Weight (average): Supersonic, 125 grains Subsonic, 220 grains.The measurements provided below are taken at the muzzle from each cartridge being fired. Because 9mm is usually fired from pistol barrels measuring 4" to 7", most other data available on this round’s energy and velocity will not be applicable. Keep in mind, these averages are based on each round being fired from an AR-15 with a 16" barrel. 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. The AR-15 is equally capable of chambering 300 Blackout and 9mm Parabellum.
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