falcon
When it is cold scopes even very good scopes do not settle down to their ending position right away. I try not to have to sight any thing in the cold but if I have to I shoot until I get a group of 3 shots in the same place before moving it again. All scopes have lubrication and springs actuating them and cold stiffens the lubrication so it might not move all the way to where you stopped it right away.