You no, this is alittle off the subject but us guys "me included" seem to make such a big deal about using a certain powder an nothing else, because of advertisement saying powder A is effected less than powder B, in this Temperature. I'm curious, has anyone out there actually tested different powders in varying temperature/environment. etc. I live near Fort Benning and know AMU guys and a Gun Smith of theirs and they aren't afraid to switch powders at all if they can't abtain something. And yes fellows, they have a hard time getting things they need just like us. But, please post or start a thread on the differences and effects of varying powders by temperature if you have any private non bias data.