Question for you 7mm Rem Mag Elk Killers?

When I was living in Texas, and just started learning how to handload, I did that too. Our days in Nov-Dec (sometimes even in January!) hunting season could start off at 32 and get up to 70 before nightfall! So hot temps were normal. I like to workup loads "whenever I have to work up new loads,ha", but try to get it settled in summer. I then like to clock it/check my zero out to 300 as it gets colder. It seems to me, that the powders I have had "go wonky" will show it in the early 80 degs, if its going too. Sometimes its sticky bolts, sometimes the groups fall apart, or zero changes. Now that I finally have a Garmin, I can watch my speeds for any real changes as the year goes by! Yeah!
 
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