I have been lurking for quite a while and discovered in older threads that the 350 gr SMK is available through Cheytec. I was disappointed to find my 375 H and H's twist is too slow. I have heard that the 375/408 cheytac uses a 1 in 11.5 but the "normal" sized cartridges will most likely need a 1 in 10 twist. This leads me to the details I would like to know. If you have been shooting this bullet in any smaller cases I'd love to hear the details.