Small/Bushed firing pins and cold weather

[timeout]

I don't have any scientific evidence for my choice of cold weather hunting primers, just a theory. I don't have the link to the information, but some time ago I saw a primer photo lineup of primers being "fired". The 7 1/2 Remington primers appeared by the photos to be far "hotter" than most. I made a decision to use them in my hunting ammo. Right or wrong, I don't pretend to know.