Thinking again. Yes, I DO lay around staring at cartridge drawings. Hey, it's cold and rainy over here.
So, lots of love around the 376 Steyr, I'm wondering why no one in all these years made up a 2 1/4" belted mag case.
It would be bigger than the Steyr and cases are EVERYWHERE!
Less feeding issues than the WSM in theory, but mostly just wondering why no one has marketed this.
The 350 Rem was close; did anyone ever try a 375-350R, or 338 for that matter (which would work even better with the longer bullets)? Should've come pretty close to factory H&H, by my guess, and it could've happened easily 40 years ago.

i have a "better" idea... an x57 jeffery/ultramag case, ..

no belt
HUGE capacity
bigger than the wsm, smaller than the 2.5" (61m) and should fit into any mauser made.

jeffe

Well, sure, that's a better idea, but I'm just wondering why no one did it.
I made up a series of Mauser-length cases last year, for what I figured would be optimum for that 3.1" COL. Actually most came out to more like 59mm, and the 7x59 is high on my list of pet wildcats. There's every reason to believe it will match the Rem with even the heaviest bullets. And the lighter ones will do better. To me, this makes more sense than the 348-sized case in the stubby 2.8", especially when Winchester's actions will hold the3.1" round anyway.
Let me have my way with a featherweight M70 Classic, and it'll be slinging 160's at 3000 from 24" of bbl.