I recently purchased a Red Field Accurange scope for my 30-06. I am very pleased with the clarity and new reticle. Overall the scope is awesome. However, I live in northwest Arkansas and the elevation here is about 1100 ft above sea level. I am going to Colorado in October for an Elk hunt and I am looking for info on how the hold overs within the acccurange reticle will differ based on hunting at 9000 ft, low humidity, colder temps, etc. I am looking at hunting with either a 165 or 180 grain bullet. The redfield website shows the 30-06 being in group 1 with a 150 grain bullet. Any help and advice is greatly appreciated.