I like H4895Extreme for that very reason. It seems to be quite tolerant of temperature change.
Over the years, I've used more IMR3031 than anything, closely followed by IMR4350. Yes, they meter terribly, but they do work! Basically switched to H4895Ext for a lot of my loadings, haven't been able to find any Ramshot TAC locally, and have some Reloder 19 and 22 to give a try.
Hope it never comes down to one powder.
IMR4064 was on sale at Wal-Mart right after Christmas - I got 3lbs. It all goes bang.
It will all fill the freezer.
Regards,
Sweetwater