Mmm hmm, you shot a rifle at -40*.?
I call bullpucky on that one.
Steel don't like mass pressure at -40* there buckwheat.
I used to go caribou hunting in Ambler with my wood stocked Remington 788 in 22-250 when it was -45F with constant 40-50 mph wind. The gun would work fine but the caribou would freeze solid so you threw them in the basketsled and haul them to the school's machine shop for processing. Locals would stack them in strange positions. I will never forget four caribou sat in chairs with an empty bootleg bottle of R+R and hands of cards froze to their hooves. I figured out the guy had one of those dogs playing poker posters. You can get some interesting malfunctions on scopes, mounts, triggers and freezing firing pins if you take them out and them haul them back into your house. The moisture and heat inside the house really messes with them. Now I don't know what a carbon fiber compound bow might do if you shot it at -50F but most rifles are fine.
