I have not found N560 to be temp sensitive . I work my loads up in the TX heat and do most my hunting in the fall , no problems . I have found in the 6.5 bore especially the 6.5 PRC , 6.5 Swede and the 6.5 x284 you will be hard pressed to find a better powder, when everyone else was raving over R26 and couldn't find any I was stocking up on N560 ,l also think it will out run vel wise R26. If I was a betting man I would bet,that is what the Swedes load in the tried and true 6.5x55 Swede . N560 may not be fast enough in the smaller case capacity's, look at the burn rates for vit powders and do some experimenting.
