Ok so I was looking around and haven't found an answer yet. I know load development is supposed to be done in hotter weather but say you were to do load development with H1000 would you worry to much about the heat? If I find the max load in cold weather and back off a grain or so does one normally see increased pressures in the summer with extreme powders? I know that some guys keep their cartridges warm when doing cold weather load development. Is this worth it? I believe it will be happening around 20 degrees.