I'm in the process of using up a bunch of odd rifle powders than I have accumulated over 30 years of reloading. ( almost 20 different types!) I'd like to consolidate and simplify my powder choices in the future. When I get the old stuff used up, and need to replace it, I'd like to get a few 8 lb kegs of versatile and efficient powders that can serve all my needs. I'm deliberately leaving out shotgun / pistol powders in my question, that's another story.

I am currently shooting the following rifle cartridges, put in categories likely to use the same powder:

.22 Hornet, .357 magnum full power, .44 magnum full power ( current favourite W296)

.222 Rem 40-50 gr., 45-70 medium power cast loads ( current favourite IMR 4198)

7x57 160-175gr., .308 / 165 gr., .35 Whelen 250 gr., 9.3x62 250-286 gr., .375H&H 270-300gr. ( current favourites Varget or H4350)

25-06 / 100-120gr., 7x64 / 160gr., 30-06 180-200 gr. ( current favourite IMR 4831)

There are many new temperature stable powders and CFE powders on the market that I haven't ever tried, double base vs single base, etc. Also note that I may hunt and shoot in extremes of heat and cold. So what do you recommend?