Well, first let’s talk about what NOT to use. This one is easy: Grease. Just say no. Nothing good can come from using grease in the cold! In fact, I almost never use grease at all, for any weather, but that’s another story.
For cold weather I use either a dry lube, or a fully synthedtic oil very sparingly. Keep in mind, you are highly unlikely to damage a gun by using too little lube for metal on metal protection. It just doesn’t take that much to provide enough lube for proper function and that’s enough with a hunting gun.
Grouse