Hello! I am considering trying a new powder for 12 gauge handicap loads. (I currently use Green Dot, but am always searching for something better.) I am considering trying either IMR PB or IMR SR-7625. As I researched these powders, it seems that they are very close on performance. Can anyone tell me which one they like the best, and why? Is there another powder that would work better? I noticed that they are both single based powders - How do they perform in cold weather? Any advice would be greatly appreciated. Thanks.