[Larryjk]

ww874, The part of the bolt you want to degrease is the firing pin and spring, especially where they go through the bolt shroud. There is really no reason to degrease the threads on the bolt shroud or the the threads on the inside of the bolt. I have never seen this area freeze because of grease. Now if you are talking a hunt in northern Alaska, maybe yes. But at least lubricate the threads with an aqueaous form of graphite or moly.
I have seen light oil freeze in a bolt, rendering the rifle unable to be fired. Happened to me a long time ago and I lost a easy shot at a 6 pont bull elk. You think I'm not serious about degreasing the correct parts of a bolt.