I have a Sako 270WSM with a 1-11" twist. I will be using 140 grain Berger VLD's. I am looking for a powder that is tolerate to temp. change. Reason being is I am grouping it now and its bout 80 degrees but hunting temp. will be 30 to 40 degrees. So I am thinking that a Hodgon powder like H4350 or H4831SC would be a good one.

Give me Ya'lls rec. on what powder and grains are a good choice. Thanks man.