I have hunted down to -13 on a couple occasions. Never had a problem. However, when hunting in bitter cold, I never take my bow inside. I always leave it in the truck or on the porch or somewhere the temperaturs stays constant. Never a problem.

had a tought. How do you know it is the bow and not the arrows? They may not be flexing the same at time of release.

(Just wanted to drive you crazy thinking about it.)