Originally Posted by WildRose
Not that I think it makes a huge difference in this discussion but the "chill factor" increases the cooling effect air. That's why you can make ice without refrigeration by circulating water cooled air.
I agree with that. Air does chill, but I'm not sure how much of a difference it would make in our situation.
We haven't seen the item being explained in the thread and if the "barrel heater" is something that slips of the end of a barrel and stock, then outside air wouldn't really matter too much. Seems that if you were getting "dope " for the scope and getting set up while the barrel warms. As soon as you get set up, remove the heater, place the gun and get set for the shot. The warming should still be beneficial. I guess some sort of testing revealing how much the barrel cools in respect to wind chill would be easy to figure out.
It's an interesting subject.
I for one would not currently carry anything like this barrel warmer unless it was very compact and very light. Most of the time, my shots are less than 500 yards and my rifle is accurate enough when cold to be able to hit a soda can at that distance cold. On a mule deer or elk, that's deadly accurate for hunting. If I were trying for something much further away, then maybe I would look into it.
This past year was the only year since 2003 when I had so much time to shoot I could have warmed my barrel. But usually my window of shooting is less than a minute or two.