Depends on the load. Tend to sight in at 70 -80 degrees at 1000 ft. In one rifle, At 4000 ft and above and 45F or less H 4831 shoots high but not enough to miss. Imr 4831 shoots about same because of slight loss of velocity w/ lower temp.
I have an altitude and temperature cheat sheet that works real well to 400 yds.
