I've adjusted all my triggers to 2 pounds per these instructions and a Lyman trigger pull scale about 1999. I tried 1.5 pounds but didn't care for the touchiness it felt like.
http://www.snipercountry.com/article...ontriggers.asp
I have taken all but the 50 cal Muzzle loader to the UP deer camp where it gets cold one season during ML season up there not one day was over 18 below zero.
I also do a lot of winter coyote hunting and am not shy about going out when it is below zero with the 243 either. No reason with todays Hi tec winter clothing to sit on the couch wringing my hands and whining it is too cold to be out side. If it got to that point I didn't like the cold or let it bother me so much I would not hunt, I would move to some place warmer like AZ. for example.
Al