I plan on doing this with my .300 Win Mag as well. I'm just waiting for warmer weather. Pushing that 208 grain AMAX at 2900fps you're looking at 2,441 inches of drop and 444 inches of wind drift with a 10mph wind. That's a 39 MIL holdover! The bullet will enter transonic flight at about 900 yards. My first interest in doing a mile shot started after I watched Magpul's video "Art of the Precision Rifle". After watching these guys hit a 16 inch plate at a mile with a 308 it really made me wanna see what my .300 could do. Good luck with it!
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