"No muzzle flash?" - Maybe, but doubtful. I've seen some of the new European propellants that only have heat waves come out of the muzzle, no smoke, but with pressures as high as would be developed in this claim, "no flash" is a bit of a stretch.
"No recoil?" - Nope! Ain't buying that one. Action=reaction anywhere on the planet.
"Twice the range?" - Doubtful. That would imply at least twice the muzzle velocity which would equal FOUR TIMES the energy which would take at least FOUR TIMES the propellant and unless they're using something a lot stronger than nitrocellulose, there isn't that much spare room in the cartridge for it.
"Killing accuracy of a mile?" - Not if its coming from a .22 bore.
The ruskies are well noted for pulling fast ones like this.
Exactly. Just because the box says it can travel/kill up to a mile away does not mean you can target something a mile away and reliable hit it.
Once the projectile goes subsonic, it will become erratic, quickly destablize and plow into the earth.
In the standard service rifle, we shoot at 600 yards. The .223s are iffy at that; which is why shooters go to more stable bullets, heavier and longer barrels, and dial-in a tremendous amount of elevation - the normal "come up" from 200 yards to 1000 yards is 36 minutes - 360 inches!!!! @ 1000 yards.
Most scopes don't even have that much elevation in them.
At our competitioin, we still use the pits - you can even hear the .223 projectiles at supersonic speeds flying over your head. We necessarily wear ear protection.