Long ways from -25 to -40*.
I can do math. And not really....
I may be crazy, but I'm not completely stupid. Emphasis on completely.
Nor have I ever needed meat that badly. In younger days out of Pt Hope, and Barrow, i liimited my winter hunts to no colder than -30. In due time, I got older, but not ncessarily smarter. Much of my hunting was done solo, and there are a lot of more important things to worry about in remote country cold temps than a non-existant problem of guns exploding from cold.
The 2010-2018 period in Kotebue I wussed out and made it no colder than -15. Temps colder than that are best used to watch the sun dogs snarling and the snow blowing, over the steam of a hot buttered rum.