Just one more observation: In my recent tests the Alliant Reloder powders have been better in cold than in the past. I suspect this came about when they had to make changes to RL-15 for military acceptance some years ago. 15 got a LOT better, and I suspect they applied that technology to the others as well--though the Hodgdon Extremes still test out as the best all-around powders for cold shooting in my trials.
