ive noticed that IMR has come out with new powders that are not affected by temperature changes. have any of you reloaders used any of these powders and how they compare to the standard IMR powders. i noticed when looking them up on their website the new powders numbers arent referenced as to what the standard IMR powders can be used for. i use IMR 4350 and 3031 to reload some of my rifles and would like to know which of the new powders compare to these.