If you intend to set up shop in any place for any length of time, it's good practice to do the following: 1) Go into the single player editor. 2) Double click on the place where you intend to be. If it's somewhere a little nuanced, just place nearby and walk there. 3) Remember to select "Sniper" as your unit type. 4) Pull out your rangefinder and write down the distances to major targets. This way, no matter what kind of scope you're using, you'll always have the proper distance to the target, letting you lead efficiently and not have to calculate target height in mildots, which is honestly a pain. You'll look over at that fire station and go, "Okay, so that roof is 420m away." And then some chump will get his brains splattered all over the rooftop. I see too many bandits missing because they don't have the right zero. Get it right! Murder more efficiently!