I don't know what scale you're using but I know my RCBS shows my pan to weigh 155.9 grains. I just always look for that as a last check after calibration.

I was doing some initial checks after getting a set of 6.5 creedmoor dies for Christmas and noticed that the dimensions of the bullets & brass changed significantly from when it was 60 degrees when I first measured them to when it was 20 degrees the other night. I doubt the steel dies had changed nearly as much since steel has a fairly low CTE. For instance, if you sized some brass when it was cold and then it warms up, you're going to get a lot less neck tension than if you size when it's warm and then shoot the ammo when it's cold.

Makes me think I'll try to do my loading somewhere around 60-70 degrees so the dimensions are all the same or close enough to the same that it doesn't matter. The main thing I was checking was neck diameter and shoulder location, and the neck diameter was .002"-.003" smaller and the case to shoulder length had come down a few thousandths as well.