Among the powders that have eally reacted to temperarture change are some of the IMR's (single-base) and some of the Aliant Reloder series (double-base).
I had always considered the loss of sensitivity in nitroglycerin at reduced temperatures to be indicative of the potential for loss of velocity too. That would mean double based powders would exhibit less pressure and thus less velocity at low temperatures.
Then, along comes double based Blue Dot that has exhibited pressures rising at temperatures below 0 degrees F. That's exactly the opposite of what would be expected.
Of course, that loss of sensitivity in double based powders seems to be part of the "extreme powder" premise.
