Since my initial post I have seen more and more data similar to what you speak of. The velocity isn't worth the hassle and more splash on target is better than a zippy .338
Now I am thinking of an improved 375 cheytac. With a long barrel (36-38") I am hoping for 3200 fps with a 400gr Lazer compared to the 300gr berger at 3300-3400 fps in a 338 cheytac based platform.
I am looking for more data on loads and velocity for the 375 cheytac improved so if anyone could spare some info, that would be greatly appreciated.