Dirt will screw up any rifle, and cold is a force multiplier for dirt. It’s one thing to have oil in the action. It’s another to have sludge, which is old oil, plus powder fouling, plus low temperatures. Every fall gunsmiths face a tidal wave of besludged rifles that will no longer function. If you’d like to de-sludge your firearm, get a can of Birchwood Casey Gun Scrubber and hose down the action. Don’t be shy. Birchwood Casey will make more. Gun Scrubber will not only clean out your guns, but will also kill wasps, hornets, and mosquitos, lift stains, remove package adhesive from knife blades, and, for all I know, cure leprosy. I expect that half the Gun Scrubber I use in a year ends up on bugs. I enjoy their screams as they hit the garage floor.