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Sounds like a good start mate, My 280ai will make my 7mm mag obsolute so i am thinking of rebarrling into a 7Rum/ Stw or going the .338 edge route

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...