This caught my eye on Accurateshooter.com the other day . A blurb article from the Shot Show that was talking about new products mentioned a new / revised powder from Alliant Powder . "Reloader 16".
The reason it got my attention was they stated it was just slightly faster than the 4350 powders and in the same pressure range as the 4350 powders . But the best part of this new formula was the increase in temperature stability , claiming it was the most temp stable powder ever created .
Definitely worth looking into if temperature changes can become a issue in your area .