Scope selection in my opinion is the most important aspect of building a precision rifle. The scope is your connection to your intended target. Your success in the long range shooting game is highly dependent on the quality of your scope, scope’s mounts and installation.
Expect to pay around $1500 to $2500 for a good one that will get the job done. Higher end models nearing the $3000 range and over will offer additional features and slightly better glass. Yes, your scope will cost more than your rifle in most cases.
This is an example of exposed turrets from a Vortex Razor HD Gen 2.
These measurements can then be used in a mathematical formula to determine the distance to your intended target. In addition, these hash marks are used as aiming points when you “holdover”. What I mean is that instead of adjusting your turrets, you can use your reticle hash marks to aim compensating for elevation and windage.
Below are two examples of reticles. Both are ranging types but one is cleaner and less confusing than the other.