In terms of applications, I put the 375 SOCOM between the 375 Winchester and the 358 Winchester--plenty of punch from 100-200 yards, but starting to run out of useful trajectory beyond that. Where the 375 Winchester was optimized for lever guns and the 358 Winchester was optimized for 308-length bolt-actions, the 375 SOCOM is optimized for the M-16 platform. In a suppressed gas gun with night-vision optics, it would be ideal for dropping large numbers of hogs or feral cattle quickly and quietly.
Range will depend on what the bullet makers offer for it. Bullets designed for the 375 Winchester will be about the right weight for 375 SOCOM, but they're too soft for those velocities, and bullets designed for the 375 H&H will be too hard.
Can't help with the sanity check.
Okie John