The literature provided in the links above indicated that these cases were magnetic.
The photo of the Sig case shows that the case head is steel and the body is brass, the presumption is that the design is the same.
So far, so good but I fail to to see the perceived advantage for standard, garden variety calibers though.
In the proposed 6.8mm round the chamber pressure is reported to be abnormally high, in this example this type of case design might prove to be necessary.
The steel case head might also help in running the cartridge through a hyper speed machine gun of an, as yet, unknown design or, maybe, just through a minigun.
I wonder how the steel case head will help with the issue of primer separation though, that problem has been with us in those guns from the early days.
Crimping the primer cup has been the solution (imperfect but better than nothing) so far, the same could be done here.
I dislike (insert stronger language with expletives here) dealing with crimped primers on all brass cases, I seriously doubt I will like it any better on steel headed cases.
It is doubtful, to me, as to what advantage will be gained in applying this tech to standard pistol caliber ammo.
I do not see the introduction of a hyper velocity 9mm pistol cartridge that shares the same case dimensions as a standard velocity round as a very good idea.
For historical reference on this, see the problems encountered with the introduction of the .38 Super after there were already several guns on the market chambered in .38ACP.
From a military viewpoint the logistics alone would be a nightmare, never mind the other, more dangerous, complications.
