Quoted:
A possible consideration is that you might want to go to the trouble of sighting it in with a cold barrel because that first shot is always cold. This is why precision shooters wait for quite some time between shots - to let the barrel cool. A way to do this is to shoot three aimed shots with the cold rifle - leave the bolt locked back and remove the magazine to promote air circulation. Determine the center of the group and measure for the scope adjustment. Make the scope adjustment. By this time the barrel will have lost some of the heat from the three shots, but depending on the ambient temperature it may still be warm. You need to wait until it cools completely - maybe shoot something else for a few minutes. Once you get it on the bull with a cold barrel, you have confidence in that first shot. Then you can fire strings of ten, heat up the barrel and note how the POI moves, if at all, so you will be aware of how to hold off if necessary with a hot barrel.