I ran some numbers on the 308 version of the WSSM. While it is strictly a simulation and I had to make some assumptions regarding case volume, the numbers gave a reasonable idea of the performance.
Basically, the 308 version will need to be pushed to 65K psi to achieve the performance of the .308 Winchester. Question is, can the rifle (upper) withstand pressures THAT high, repeatedly? I do not know. The WSSM versions run slightly lower pressure than that, so it might be feasible. The Holy Grail is a little closer, but not quite there yet. (At least, not according to the computer)
Now, we also looked at making a 375 version, simply because the length of the case happens to perfectly match the location of the cannelure on the Barnes .375 X Spitzer. The resultant cartridge (375 WSSM) yields performance similar to the 375 Winchester.
Then there are the obvious two questions: What about a 458 WSSM to rival the 458 SOCOM and a 50 WSSM to rival the 50 Beowulf? Both could be done, and both would indeed raise the bar.
Looks like Olympic Arms really did their homework on this one. Hats off.
This just means that us other tinkerers need to think further outside the box to raise the bar yet another notch....
Fun, fun
Marty