Some bolts can be taken apart easily, exposing the firing pin and spring. Too much grease on the spring can cause sluggish action in cold weather, so wipe it clean and apply only a light coating of oil. If the stock inletting has a good coat of finish, all is well and good, but many stocks don't, and raw, unfinished wood is an open door to moisture, which can do ugly things to accuracy. The best interior protection is several coats of a tough epoxy or polyurethane floor varnish, but these take a day or so to dry thoroughly before reassembly. If you don't have time to wait, at least rub some paste floor wax into the exposed grain. I prefer scrubbing the bore while the barrel and action are out of the stock by holding it securely in a padded vise. Be sure to use a bore guide.