I am new to metallic reloading, been doing shotshell for quite a while, and I realize they are not the same thing. I am curious as to if the Alliant reloader series of powders is as temperature insensitive as the Hodgdon Extreme series of powders is. I am in Wisconsin and at least at this time would like to work up a load that a rifle likes and just go with it rather than a summer load and and winter load.... so the idea of the stability of the Extreme series is appealing to me. So what have your experiences been. Right now I am loading for my 223 Rem, 223 Ackley Improved, 243 Win and 280 Rem, and have not gotten too far into the process. Thanks in advance for your replies.