Some of us have long standing habit of ONLY using cold-weather hunting loads that have at least 9.000 psi at nominal 75F temperatures. We acquired that habit after getting bloopers in cold weather - near freezing or below - with loads of slower burning powders, loads that were just fine at 50F and above.
Lower pressure - lower velocity loads with Blue Dot taught me that lesson one cold day in the marsh. Two more grains of that slow powder and all was well, down to around freezing, at least. My all-time favorate powder for lower pressure, lower velocity loads, IMR SR7625, needs to be loaded to nominal 9K+ psi at 75 F to give reliable perfomance when the ice forms. Green Dot, by contrast, does not produce bloopers so readily when going from 75F to freezing. I use a lot of Green Dot in recent years.
Niklas
