The Firearm Blog has story of Finnish shooter trying for 4000 meters.
The article is a bit long, but if you are interested in small details that goes in to this type of shooting it is worth reading.
Ammo: .375 Cheytac
Firearm: Sako M10 modified to shoot .375 Cheytac
Temperature: 22 celsius
Wind: 2-3m from 7 o'clock
Coriolis effect at 4000m: 2.4m
Flight time: 11.2 seconds
Target size was 2.4m x 2.4m
Shooter hit the target with his second shot, 40cm to right, 60cm up
From: The Firearm Blog