Your rifle must be sighted in at 100 yds and shooting 1" groups. Moving out to 200 yds makes a whale of a difference in seeing your mistakes. 300 yds and you need some nice glass aboard the rifle and a caliber that shoots well at that distance. Like they said it's expensive to know you can make the shot and only practice will tell you if you can do it. I have started moving my optics to 4x12 and 4x16 as my eyes aren't what they used to be.