New to this so maybe someone can help me out. I am setting up a 6.5 Creedmoor. I am wanting to use Hornady ELD-X 143 gr ammo. What variables do I input into the ballistic app? G1, G7, or CC? Do I just need to shoot it at different distances and change the muzzle velocity in the app to get it line up and will this continue to be consistent at farther distances? Only shot out to 300 yards thus far. Planning on getting to a longer range soon but want to make sure I don't waste time when there. Thanks for any help.