RR.... I don't shoot at the extreme ranges that you often do...
The TSX group under an inch in my rifles ( 3 shots @100 yd).. That is actually more accuracy than I need, since I seldom shoot over 300 yards and never shoot over 400...
At very extreme ranges I would suspect that the monolithic bullets might be less apt to expand due to reduced velocity.. I'd think that at such ranges, one would want to use the most accurate, fast expanding bullet available..