The firing spring in my bolt-action rifle is only slightly less dry than the lowest point in Death Valley. What type of lubricant is best to apply to it? I have RemOil in a spray and blue high-pressure grease. I don't run dozens of rounds per minute through the rifle , so I'm not overly worried about excessive friction galling the steel of the firing pin itself. What's your opinion about with what to lubricate the spring? Thanks.