Certain powders are temperature sensitive - ok. What are the effects of this property? What are some of the more temperature sensitive powders? What are some of the less temperature sensitive? Is there a cure for this disease? I have discovered that there is much more to shooting and doing it at more than "normal" ranges than I ever realized. And I got my first gun the year that Ike was elected President the first time! Oh well, some of us are just slow learners.