It's not a new idea, with SS head and brass or aluminum case to make up the rest of the case.
It was advertised in Precision Shooting mag over 20 yrs ago.
And Shell Shock has been making 2 piece 9mm cases with SS heads for a long time, and claim 2 times the strength of brass cases, have 115 gr at 1521 fps in a test and loaded some 185 gr bullets in 9mm ....And you can purchase there cases by the thousands for reloading...rather cheap. It just doesn't seem to catch-on,..the two piece case.
I can run 168 Berger in a 308 at 2920 - 2930 fps in a 22" barrel. So another 100 fps seems unimpressive, for SS case head. We probably run some of those brass cases to 70,000 psi anyway. 80,000 is not much of a stretch. Good hand loaders could run them at 90000 psi. A pipe bomb next to the head, as the trigger is activated.
With all the robotic armies, drones, and electronic gagets planned, in the present & near future a cartridge rifle seems...outdated.
The drone has face recognition, infra red, and armed, with the latest technology, and rocketry, it can find YOU in the dark and you'll never know it's there.
The 135 gr armor piercing bullet at a mere 3000 fps is usless. This will not change the outcome of any war.
7mm-08 would seem to be a better military case...but I depend on the bullet, and what the government is trying to accomplish...like give my brother- in- law a big military contract, to grab up some personal retirement cash, as VP of the company, a multi million dollar gig, just to show up once a week, to discuss "business" with my provided personal secretary.
How it works... a reality test, for those who don't belong to the club.