I will be starting load developement for my 338 Norma Mag in a week or so, and will be trying Ramshot Magnum. I can't seem to find any info on how temp sensative it is. The Ramshot is suppose to have some of the best velocities w/ accuracy for the 338NM, but since here in Mont. tempratures can vary from +90 in atelope season to -20 in elk season, I am a little concerned in how this powder will handle the variations. Since the Ramshot website doesn't seem to offer any info on this, does anyone out there have any experience with this powder that can help me out here.