Hi Guys, I have used my double rifles, a Wilkes 475 #2 and a Jeffery .333, in Montana for nearly 20 years without problems, including hunting at 42 below zero. I once killed a mule deer with the 333 at about 25 below. The actions do not freeze up and are easy to open after the shot, possibly due to the heat of the ingition. However, I have had several bolt rifles freeze. Usually it is grease in the firing pin spring (boiling won't work, you have to take apart the bolt and thoroughly degrease). The firing pin falls, but not with enough force to ignite the primer. Also, my brother's Weatherby bolt rifle wouldn't chamber a cartridge at 42 below. The pin on the side of the rail froze solid. He stuck the rifle up under his shirt and hiked around for an hour, the rifle was still froze, hiked back to the road, then had to have a passing trucker give him a jump to start his car. Tough luck on a tough day. Keith