Anyone of the three you mentioned are good for the job. The 300 Win Mag with the 200 gr plus bullets would have a slight edge over the WSM. I run 200 gr ELD X in my 300 Win Mag at 2900 fps and could load a bit higher, my nephew just got a Rem 700 300 WSM and we tried various loads the other day and using RL 26 got 2800 fps with the 200 ELD X. I get 3070 fps with the 162 gr ELD X in my 7mm Rem mag. I am sure they would all be fine out to 600 yards or further if needed.
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