I tried a little experiment while we had our cold snap. I shoot black powder and use bore butter as a lube and as a barrel rust preventer. My experiment went as follows:
Lubed my 41mag barrel, that normally shoots the first shot high with a clean cold barrel, with bore butter and ran a few dry patches to just leave a film. Set it and the ammo in the garage overnight(18degrees in the morning), shot it at 8am when the range opened. Bullseye, first shot and the rest of the cylinder all went into the same group. So, I went home and cleaned it and did it again, Bullseye, all shots grouped right where they should. Barrel looked clean and bright like normal. I use a 3parts BAC 1 part Carnuba lube. I have to do more testing but the temps haven't been low enough. I want to try the same with a few guns and see if it carries over.