I'm burning US 869 because it is supposed to be temperature insensitive and I just got a serious wake up call! I went from 9.25MOA of come up for 556 yard shot at 75F to 11MOA at the same distance at 32F. (shooting 300 SMKS w/99grains US869 in a RUM) Do you guys try to keep your shells warm when your out glassing for game in cold weather or do you figure out your come ups based on temperature of the shells? I run Exbal and was wondering if there was anything about this program concerning temperature I should know about? I live in Alberta so temps get pretty extreme here!