While OKFC05, is absolutely correct. I want to offer this for consideration.
I have been to many HIGH POWER RIFLE matches, this is the No. 1 thing most shooters will tell you.
It does not matter what you are shooting, get the best optic's you can afford. Reason why " If you can't see it, you can't hit it."
There is alot of scopes with variable yardage objectives on the market. All of my 22 rifles have high power rifle scopes with varibale objectives and variable power settings.
Good luck shooting. Be safe and enjoy !