I have been searching for a M-S 9.3x62 and every one I have found (not a lot) are $5000 and up. I have found a couple of M-S 1950 and 1952s in .270 and .30-06 that are not collector rifles and am thinking about having one rebored and rechambered to 9.3x62mm. Would this require the rotor to be changed or modified? Has anyone done this before?