Been hereing bits and pieces about a 338 lapua short that the military is developing. Anyone familiar. true, origins, status, etc.?

First I've heard. Sounds interesting, though.
I'd think the only way for it to be of any benefit would be to try to fit it into a 308-size action, and even that sounds a little silly, when we only use the 308 for the SAWR (or is there something else?)
And to make a case that's .590" at the base and only 2.1" long or something, and chambering a .338" bullet, to make it feed in full auto might be a trick.
Might be able to match the 340 with the light-med bullets.
Right now they have the BMG, the Lapua, the 308 (and 300), the 223 and this new 270 round. I'm just not seeing what a short 338 Monster Mag would do for them.
But if you see anything informative, I'd love to read about it.
Thanks!