RE: Hodgdon Extreme vs. the rest
I've used IMR, Hodgdon, Hercules, Alliant, and Winchester ball powders from 1952, to date! At temperatures ranging from over 100 degrees in TX, NM, and AZ to -30 degrees in interior Alaska, and elevations from sea level up to over 14,000 feet. I have never seen enough variation in performance of any of them due to environmental factors to be worth getting concerned about. Just zero your guns for the currentconditons of temperature, humidity and altitude, and you will kill your game!