It's just a cartridge that fixes and non-existent problem, in my opinion. I have fired it,and am not impressed at all with the ballistics.
It will probably turn into another Ackley type cartridge that has very few followers, and leaves the shooter doing all of the work.
The bottom line behind this cartridge is that everyone wants to get a piece of the pie with a military contract. In all reality, it will probably NEVER make it to the preliminary testing phases with the US military, and will fall by the wayside in 5 to 10 years. Fifty years from now people will look back on it, and call it an obsolete cartridge, and there will be no interest in it whatsoever.
Sorry to be so skeptical, but I'm in the exact same boat with the .458 Socom. At least
that cartridge has some potential. The 300 Blackout has no use whatsoever unless you run a suppressor, and even then .... there are better choices.
In my opinion, there are a lot of ammo and gun nuts who are asking 'what's next?', so they are inventing cartridges and firearms to curb their appetite for something new. The military and other popular cartridges have already been perfected. People are chasing unicorns if you ask me.
There are some who want to be able to claim 2k yard accuracy and sub-MOA at 1000 yards with their next caliber incarnation. It's not happening, and they should really look elsewhere.