I would go with a 280ai ( like i have just done) or a 284 win shoot the 162 amax around 2850.
Start off slow and build your shooting ability at longer range, Take time and make a good correct drop chart, range finder and scope with target turrets and go from there.
It will take a lot of time and a lot of practice and its a hell of a lot of fun just doing that part not to mention the rest.
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