long range shooting

Hey guys, Im currently in the market for a new rifle in 6.5 creedmoor. The rifle would mostly be used for hunting but maybe long range target shooting occasionally. Im looking at a bergara ridge SP with the 18" barrel. I chose this becuase the 18" barrel would be a dream to have for the deer...

I am trying to teach myself how to shoot long range however the mathematics are really getting to me. Anyone know of any websites or books that I can check out that can break this stuff down? Thanks!

Its been 25 years since I've messed around with firearms. I use to be an FFL holder and went shooting most every weekend and even hunting every now and then. I am getting the itch to do some really long rang plinking. Not sure what I want to get as far as rifle's go. I do know I want a .243...