It's time has passed but I always thought an M1 Carbine chambered for a rimless .357 magnum cartridge would be a neat idea. Keep the pressure at 40,000 psi and you could get some real whomp out of a 158 grain bullet. Of course that almost duplicates the .351 WSL but that one is just a tad long for the carbine receiver (I think), whereas the .357 OAL is about the same as the .30 Carbine. Plus you could use all of the .357 diameter bullets available instead of an oddball .352" bullet.
Gunnery, gunnery, gunnery. Hit the target, all else is twaddle!
