I voted "maybe." Simply because I already have the .357 Magnum in a levergun & the .357 Max in a single shot.
The idea here that intriques (sp?) me is the 7.63x39 case necked up to .35 caliber. Taking a CZ 7.62x39 boltgun and having the barrel re-bored to .35 caliber would probably be the easiest route. My only question would be do we still need a chamber reamer made and what is the cost of that? This cartridge would probably work best with the lighter pistol boolits in the 158-180 grn range. Seems like you could get them stepping out there at a pretty respectable speed. Should be sure death on "garden varmints." [smilie=1: