i think i would go with the 300 if i where you what kinda scopes on it and does it have enough to get there.

its going to take 262.9" at 25.1 come ups in MOA

to check this out you can go to hornaday.com and use there ballistics calculater and run your numbers ;D

P.S. you can print out your drop cart off of it to i have one taped to the side of my 223 and as i havent shoot at a 1000 yet i think i might be able to get there with it ;D it well take 37.5 MOA to get there i shoot 68gn match bthp right at 3000 fps