Would also mention, in addition to elevation, wind plays a major role at that range. Unless you have a dead calm, or wind straight up and down range, expect that bullet to do some walking. You might want to run some calcs on various winds at that range, and have them on a cheat sheet.
And please excuse my bringing this up- but is the distance 1000 yards, or 1000 meters? I ask for a reason- saw a gent that had his dope down for 1000 yards, and the match was 1000 meters- which is not quite 94 yards FURTHER.
What we have here is... failure- to communicate.