I'm liking Hunter in my 300 WSM with 180 AB's. Accurate, meters well, and it's not a "temperature sensitive" powder.
If temperature sensitivity is a priority, you'd be better off using one of the Hodgdon Extreme powders or a Ramshot powder than using an IMR powder, regardless of what you might currently have on hand. On the other hand, if all you can get is H414 or IMR 4350, just make sure that you check your zero in conditions similar to what you'll be hunting in.
