I never considered the 200gr until now. Seems to me the only question would be cramming enough 4350 in the case with that long a bullet. The BC must be way up there around .58???? That would make for a bullet with way over 2000 ft pounds of energy at 300 yards. and probably traveling faster with less drop.

I've been reloading 180 gr noslers in my '06 since 1961 and the thought of changing never entered my mind until now. I'm going to do some research....this sounds really interesting.
I called nosler....here is it in a nutshell. BC on the 200 grainer is .588!!! 53gr IMR4350 gives a MV of 2520. Of course, their data is ultra conservative. My guess is 2600'/sec is achievable without compressing the load. Does anyone have the ballistic tables for a 200 grain 30 cal bullet? I have the 190 and 220 data only. Regards, Rick.