So i did a search and couldn't come up with anything. Don't even know if this the correct place to ask this , but here goes. Does cold affect the barrel as far as accuracy if staying out in the cold all day? I know temps affect powders. The reason i ask is i am trying to work up a load for my Proof Research Carbon Fiber wrapped barrel i recently purchased. 6.5CM, 26" 1:8 Loading Berger 153.5's H4350 42gr. nothing hot. Not setting up the labradar just working on loading depth for a tight group. The loads i loaded last night and shot first thing today were pretty nice. The gun stayed outside on the bench all afternoon. Windchill below freezing. I just went back and forth to my reloading room and worked up 5 rounds at a time, so the powder was never affected by the cold, but by the end of the afternoon, even going back to my first loads that were nicely grouping at noon, are now opened up. I did other things thruout the afternoon, so maybe I'm getting tired by the end of the day? Or does the cold affect the steel in the barrel which could cause groups previously tight to open up? I know steel contracts in the cold like a lot of other things. Thought's? I'll appreciate any imput, thanks
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