Regardless of the bullet that you pick if long range is your objective you can't neglect the enviromental factors. The use of balistic software can make a difference.
Have you had the opportunity to see "Magpul: The Art of the Precision Rifle"
I've found it interesting and instructional.
"Socialized Medicine is the Keystone to the Arch of the Socialist State.” -Vladimir Lenin
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." - Thomas Jefferson (An early warning to Obama care)