![]() ![]() Mcb you are correct, but you might as well forget arguing this point. Long grooves in its gilding metal jacket combine with the bullet’s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand. The Super X Subsonic Power Point line of ammunition delivers the ideal balance. The 190 grain Sub-X (Subsonic - eXpanding) bullet features a lead core. It offers 30 percent more energy and 300 fps more speed than the. You can lead a horse to water but you cant make it drink. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. Maybe Remington is using magic pixie dust powder that us lowly hand loader do not have access to. Given the lower pressure of sub sonic 300blk you can have partial burnt powder grain ejected from the muzzle producing no muzzle flash because they simple stopped burning do to the low pressure/temperature at muzzle exit.Īgain 9-inch might be optimal barrel length to get good performance from both super and sub sonic rounds but the idea that sub sonic rounds are burning all the powder in 9-inches for must published sub sonic loads is just not true. 223 magazine lines up with the case shoulder to keep. 300 Blackout cartridge largely feeds without incident from an unmodified. or the 125 NBT, both of which expand well at reasonable ranges and penetrate deeply). I was wondering if there’s anyone out there running the sub x at max velocity. a 30-round 5.56 NATO AR mag will still hold 30 rounds of Blackout. I have been running the 180 SST with 18.5 CFE BLK at 1600 fps. And just because there is no muzzle flash does not mean the powder is fully burnt either. 300 Blackout-chambered AR-15 still uses the same magazines without a loss of capacity, i.e. AAC can claim what ever they want that does not make it true. But the round was developed to have complete powder burn in a 9" barrel.Įvery publish load on Hodgdon's site and a few others I dug up on the internet when simulated in Quickloads result in a load that has not completely burned in a 9 inch barrel. Personal experience and that of others.Īre there loads that aren't completely burned in a 9" barrel? Of course. We dive into 5.56 vs 300 blackout round in an indepth article covering terminal ballistics, the history 5.56 and 300 blackout, and more. The real world shooting demonstrates that shooting 300 BLK out of 9" barrel gives no flash, meaning complete powder burn has occurred. Read any forum discussion on 300 BLK barrel length and most people will say 9" is optimum. I'm also going by what most people consider to be the optimum barrel length of 300 BLK: 9". This is straight from the people who developed the 300 BLK. I'm going by what AAC themselves said about development of the 300 BLK round: 300 AAC Blackout Ammunition was designed to be used in a 9" barrel, meaning you get a complete powder burn in shorter barrels. ![]()
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