There's a lot of effects that come into play with precision shooting, including ambient temperature.
What about the temperature of the ammunition itself?
What if it's in the shade, or in a cooler, or directly in the sun? It's not uncommon to see precision shooters intentionally keeping their ammunition in the shade, or under cover of some sort, or even in a cooler.
Some powders are considered more temperature sensitive than others as well.
How much of an effect does this have with the ammunition we're using for this series so far? Let's find out...