Butler Creek scope caps break easily, but they're cheap. So find the right size for the rear end of the scope and buy more than one. Get some white masking tape, cut it to fit inside the scope cap, write your DOPE chart on the tape. When you open the cap, you can easily reference the chart.
I'd recommend going to a 178 A-max or 175 Match King. Out of a 308 Win it is very consistent to 5-600 in all conditions. More so than the 168, and cuts the wind better. When you've shot enough, you'll eventually have the corrections memorized.
Keep the scope set at the lowest power setting, and parralax set for 100 yards, ALWAYS. Consistency is the name of the game, muscle memory will be developed if you know you are set on a low magnification, and parralax is always set for 100 as soon as you touch the scope. You will also be faster gaining the initial sight picture on a low magnification. Even with a tail wind you should adjust parralax to be able to see the mirage. You will have a left to right, or right to left deflection with a 12 o'clock or 6 o'clock wind. It's the type of wind I hate shooting in.
I work in the country quite a bit, and usually have a rifle with me. Rifle, ammo, range finder is all I take. Speed is of the essence when trying to get a shot on a hog or coyote, which I try to never let walk.