LOL..... It IS cold in Canada, so when us canucks discuss temp sensitivity it is usualy with regard to the resulting loss of velocity when you take that sweet summer time load out in january. My pet .308 load with ww748, (168 gr AMAX, neck sized win brass, 44.6 gr ww748, 2.8coal) (2665fps @20degC, 2565fps @-20degC) loses about 100 fps, it still shoots ok though cuz by chance the mv lands almost perfectly on the next node!!