I was able to make the range this morning for a few hours . It was very cold when I arrived with a temperature of 19 and wind chill around 10 or so . I have a pet loading for my AI Remington , that is good for around .4 to .6 for the most part when I do My job behind the trigger . I have read that Varget is a very temperature stable powder and for the most part has been my experience with it . I've seen loads get a little hot in midsummer , when the round sit in the sun , but still shot great . The first twenty down range , the groups opened up into two distinct groups side by side , stringing slightly vertically opening up to ~ 1.2 - 1.5 inches slowly getting tighter as I progressed . The second twenty tightened up significantly , into about normal group size for this piece . It did warm up significantly for the second target sets , into the thirty's . What are your experiences , was it just the loose nut behind the trigger shivering , or do I need to step up the loading a bit for the very cold . Any thoughts ?