Re: Fluted barrels
As stated already, it adds more surface area and helps it cool a wee bit faster. IMHO the best way to add many many more acres of surface area for cooling is a good corse bead blasting. These are much smaller but add up to much more cooling ability.
Some claim that it makes a barrel more ridged. 2 barrels of equal length AND weight, the fluted barrel WILL be more ridged. 2 barrels that started out the same length and weight and one got fluted, I am not so sure about.
In snowy conditions they tend to catch snow and when you fire a shot it propels snow onto your scope lense and freezes to it VERY quickly making it impossible for a follow up if needed.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.