i have been using holdover techniques most of my life basically because most of my rifles have cheap scopes on them. Until I got my viper HST about 7 years ago i never spent more than a hundred bucks on a scope. So i learned how to sight in at a 100 yards for 300 to 500 yard shots. Last year i got a 20 moa riser for my 3006 REMington 700 so could try some long shots with it.